Even number

A number, specifically an integer that can be split exactly in half, with no remainder or fractional parts. In the physcial world, an even number of objects can be placed into exactly 2 groups that have the identical number of objects.

All numbers ending in 0, 2, 4, 6, or 8 are even.

See also

• Odd number

External links

• Parity

Number classes

General numbers

Integer Natural Even Odd Rational Irrational Real Prime Probable prime

Special numbers

Mersenne 2n-1 Fermat 22n+1 Proth k•2n+1 Riesel k•2n-1 Woodall n•2n-1 Cullen n•2n+1 Double Mersenne 22p-1-1 Perfect 2n-1(2n-1) Leyland xy ± yx Gen.Repunit (b^n-1)/(b-1)

Prime numbers

Mersenne Proth Riesel Williams (b±1)bn±1 Carol/Kynea (bn±1)2-2 Multifactorial n!j±1