Q: Is 21,663,450 a Composite Number?

Why is 21,663,450 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 21,663,450 can be evenly divided by 1 2 3 5 6 9 10 15 18 25 27 30 45 50 54 75 81 90 135 150 162 225 243 270 405 450 486 675 810 1,215 1,350 1,783 2,025 2,430 3,566 4,050 5,349 6,075 8,915 10,698 12,150 16,047 17,830 26,745 32,094 44,575 48,141 53,490 80,235 89,150 96,282 133,725 144,423 160,470 240,705 267,450 288,846 401,175 433,269 481,410 722,115 802,350 866,538 1,203,525 1,444,230 2,166,345 2,407,050 3,610,575 4,332,690 7,221,150 10,831,725 and 21,663,450, with no remainder.

Since 21,663,450 cannot be divided by just 1 and 21,663,450, 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).