Q: Is 21,423,528 a Composite Number?

Why is 21,423,528 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 21,423,528 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 18 21 24 27 28 36 42 54 56 63 72 81 84 108 126 162 168 189 216 252 324 378 504 567 648 756 1,134 1,512 2,268 4,536 4,723 9,446 14,169 18,892 28,338 33,061 37,784 42,507 56,676 66,122 85,014 99,183 113,352 127,521 132,244 170,028 198,366 255,042 264,488 297,549 340,056 382,563 396,732 510,084 595,098 765,126 793,464 892,647 1,020,168 1,190,196 1,530,252 1,785,294 2,380,392 2,677,941 3,060,504 3,570,588 5,355,882 7,141,176 10,711,764 and 21,423,528, with no remainder.

Since 21,423,528 cannot be divided by just 1 and 21,423,528, 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).