Q: Is 21,243,132 a Composite Number?

Why is 21,243,132 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 21,243,132 can be evenly divided by 1 2 3 4 6 9 12 17 18 34 36 51 68 102 103 153 204 206 306 309 337 412 612 618 674 927 1,011 1,236 1,348 1,751 1,854 2,022 3,033 3,502 3,708 4,044 5,253 5,729 6,066 7,004 10,506 11,458 12,132 15,759 17,187 21,012 22,916 31,518 34,374 34,711 51,561 63,036 68,748 69,422 103,122 104,133 138,844 206,244 208,266 312,399 416,532 590,087 624,798 1,180,174 1,249,596 1,770,261 2,360,348 3,540,522 5,310,783 7,081,044 10,621,566 and 21,243,132, with no remainder.

Since 21,243,132 cannot be divided by just 1 and 21,243,132, 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).