Q: Is 21,678,132 a Composite Number?

Why is 21,678,132 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,678,132 can be evenly divided by 1 2 3 4 6 7 12 14 21 28 42 84 421 613 842 1,226 1,263 1,684 1,839 2,452 2,526 2,947 3,678 4,291 5,052 5,894 7,356 8,582 8,841 11,788 12,873 17,164 17,682 25,746 35,364 51,492 258,073 516,146 774,219 1,032,292 1,548,438 1,806,511 3,096,876 3,613,022 5,419,533 7,226,044 10,839,066 and 21,678,132, with no remainder.

Since 21,678,132 cannot be divided by just 1 and 21,678,132, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).