14 (number)

14 (fourteen) is the natural number following 13 and preceding 15.


Cardinal	14 fourteen
Ordinal	14th fourteenth
Factorization	$2 \cdot 7$
Divisors	1, 2, 7, 14
Roman numeral	XIV or XIIII
Binary	1110
Hexadecimal	E

In mathematics

Fourteen is a composite number, its proper divisors being , , and .

In base fifteen and higher bases (such as hexadecimal), fourteen is represented as E.

Fourteen is the sum of the first three squares, which makes it a square pyramidal number.

This number is the lowest even n for which the equation φ(x) = n has no solution, making it the first even nontotient (see Euler's totient function).

14 is a Catalan number, the only semiprime among all Catalan numbers.

Take a set of real numbers and apply the closure and complement operations to it in any possible sequence. At most 14 distinct sets can be generated in this way. This holds even if the reals are replaced by a more general topological space.

Fourteen is a Keith number in base 10: 1, 4, 5, 9, 14...

Fourteen is an open meandric number.

Fourteen is a Companion Pell number.

In science

Chemistry

The atomic number of silicon

The maximum number of electrons that can fit in an f sublevel

Astronomy

Messier object M14, a magnitude 9.5 globular cluster in the constellation Ophiuchus

The New General Catalogue object NGC 14, a magnitude 12.5 irregular galaxy in the constellation Pegasus

The Saros number of the solar eclipse series which began on -2568 July 31 and ended on -1035 February 6. The duration of Saros series 14 was 1532.5 years, and it contained 86 solar eclipses.

The Saros number of the lunar eclipse series which began on -2230 June 1 and ended on -932 July 19. The duration of Saros series 14 was 1298.1 years, and it contained 73 lunar eclipses.

In religion

The number of Stations of the Cross
The Fourteen Holy Helpers were a group of saints formerly venerated together by Roman Catholics
The number of muqatta'at in the Qur'an
The number of words in the Jewish Priestly Blessing

As lucky or unlucky number

14 represents good luck in South American countries
14 is an unlucky number in China. Although 14 is usually said as "shi si," which sounds like "ten die", it can also be said as "yi si," literally "one four." There is also a common way to say "one," and it is "yao." Thus, 14 can also be said as "yao si," literally "one four," but it also means "want to die."

In sports

Retired number of former baseball stars Pete Rose and Ernie Banks
Number worn by Ivan Miljković, Serbian volleyball player, considered to be among the best attackers in the world
The G-14 is a union of eighteen football clubs.
In rugby union the right wing wears the 14 shirt.
In football the number of Johan Cruijff and Thierry Henry.

In other fields

Fourteen is:

The number of days in a fortnight.
In traditional British units of weight, the number of pounds in a stone.
A number 'encoded' in a lot of the music of Johann Sebastian Bach. Bach may have considered this number a sort of signature, since given A = 1, B = 2, C = 3, etc., then B + A + C + H = 14 and J + S + B + A + C + H = 41.
The number of points outlined by president Woodrow Wilson for reconstructing a new Europe following World War I, see Fourteen Points.
Among neo-Nazis, 14 signifies the "Fourteen Words"—"We must secure the existence of our people and a future for white children"—attributed to David Lane.
The section that you go to when you die in the Grailquest books
The number of a Mexican street gang, the Norteños. It designates N, the fourteenth letter of the alphabet, which stands for "Northerner".
The number of legs on a pillbug, as well as on Hallucigenia.
A common designation for the thirteenth floor in many buildings for superstitious reasons
The number of fonts included in a standard installation of Adobe Acrobat or Acrobat Reader (called "Base 14 fonts"). This set is the same as Base 13 fonts with the addition of Zapf Dingbats.
The number of points in a proposed republican constitution of the United Kingdom
In tarot, card No. 14 is "Temperance".

Historical years

14 A.D., 14 B.C., 1914, 2014, etc.

Integers

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