Q: Is 21,121,672 a Composite Number?

Why is 21,121,672 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 21,121,672 can be evenly divided by 1 2 4 8 11 13 22 26 37 44 52 74 88 104 143 148 286 296 407 481 499 572 814 962 998 1,144 1,628 1,924 1,996 3,256 3,848 3,992 5,291 5,489 6,487 10,582 10,978 12,974 18,463 21,164 21,956 25,948 36,926 42,328 43,912 51,896 71,357 73,852 142,714 147,704 203,093 240,019 285,428 406,186 480,038 570,856 812,372 960,076 1,624,744 1,920,152 2,640,209 5,280,418 10,560,836 and 21,121,672, with no remainder.

Since 21,121,672 cannot be divided by just 1 and 21,121,672, 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).