Q: Is 21,135,136 a Composite Number?

Why is 21,135,136 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 21,135,136 can be evenly divided by 1 2 4 8 11 16 22 32 44 88 97 176 194 352 388 619 776 1,067 1,238 1,552 2,134 2,476 3,104 4,268 4,952 6,809 8,536 9,904 13,618 17,072 19,808 27,236 34,144 54,472 60,043 108,944 120,086 217,888 240,172 480,344 660,473 960,688 1,320,946 1,921,376 2,641,892 5,283,784 10,567,568 and 21,135,136, with no remainder.

Since 21,135,136 cannot be divided by just 1 and 21,135,136, 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).