Q: Is 21,128,667 a Composite Number?

Why is 21,128,667 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 21,128,667 can be evenly divided by 1 3 7 21 59 177 413 1,239 17,053 51,159 119,371 358,113 1,006,127 3,018,381 7,042,889 and 21,128,667, with no remainder.

Since 21,128,667 cannot be divided by just 1 and 21,128,667, 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).