0

0 is a number. It follows -1 and precedes 1.

Properties

 * Neither positive nor negative
 * Multiple of every number
 * Neither prime nor composite
 * Any number multiplied by zero equals zero
 * Division by any number equals zero
 * Division by zero is undefined
 * Additive identity
 * Zero to any positive power equals zero (00, 0-1, 0-2, ... are undefined)