Q: Is 21,239,280 a Composite Number?

Why is 21,239,280 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 21,239,280 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 36 40 45 48 54 60 72 80 90 108 120 135 144 180 216 240 270 360 432 540 720 1,080 2,160 9,833 19,666 29,499 39,332 49,165 58,998 78,664 88,497 98,330 117,996 147,495 157,328 176,994 196,660 235,992 265,491 294,990 353,988 393,320 442,485 471,984 530,982 589,980 707,976 786,640 884,970 1,061,964 1,179,960 1,327,455 1,415,952 1,769,940 2,123,928 2,359,920 2,654,910 3,539,880 4,247,856 5,309,820 7,079,760 10,619,640 and 21,239,280, with no remainder.

Since 21,239,280 cannot be divided by just 1 and 21,239,280, 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).