Twelve: Difference between revisions

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Twelve is a natural number following eleven and preceding thirteen. The number twelve holds significance in various fields such as mathematics, religion, and culture.

Mathematics

In mathematics, twelve is a superior highly composite number, a number with more divisors than any number scaled down from it. It is approximately the integer part of the 12th root of 2. It is a Harshad number and a subfactorial number.

Religion

In religion, the number twelve holds a significant place. In Christianity, there are twelve apostles of Jesus. In Judaism, there are twelve tribes of Israel. In Islam, there are twelve Imams in Shia Islam.

Culture

In culture, there are twelve months in a year in the Gregorian calendar. There are also twelve signs in the Zodiac. In music, there are twelve notes in the chromatic scale.

See also

Number systems

Sets of definable numbers	* Natural numbers ( $ℕ$ ) Integers ( $ℤ$ ) Rational numbers ( $ℚ$ ) Constructible numbers Algebraic numbers ( $𝔸$ ) Closed-form numbers Periods ( $𝒫$ ) Computable numbers Arithmetical numbers Set-theoretically definable numbers Gaussian integers Gaussian rationals Eisenstein integers
Composition algebras	* Division algebras: Real numbers ( $ℝ$ ) Complex numbers ( $ℂ$ ) Quaternions ( $ℍ$ ) Octonions ( $𝕆$ )
Split types	* Over $ℝ$ : Split-complex numbers Split-quaternions Split-octonions Over $ℂ$ : Bicomplex numbers Biquaternions Bioctonions
Other hypercomplex	* Dual numbers Dual quaternions Dual-complex numbers Hyperbolic quaternions Sedenions ( $𝕊$ ) Trigintaduonions ( $𝕋$ ) Split-biquaternions Multicomplex numbers Geometric algebra/Clifford algebra Algebra of physical space Spacetime algebra Plane-based geometric algebra
Infinities and infinitesimals	* Cardinal numbers Extended natural numbers Extended real numbers Projective Extended complex numbers Hyperreal numbers Levi-Civita field Ordinal numbers Supernatural numbers Surreal numbers Superreal numbers

* Classification

List

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