Q: Is 21,523,770 a Composite Number?

Why is 21,523,770 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 21,523,770 can be evenly divided by 1 2 3 5 6 9 10 15 18 19 30 38 41 45 57 82 90 95 114 123 171 190 205 246 285 307 342 369 410 570 614 615 738 779 855 921 1,230 1,535 1,558 1,710 1,842 1,845 2,337 2,763 3,070 3,690 3,895 4,605 4,674 5,526 5,833 7,011 7,790 9,210 11,666 11,685 12,587 13,815 14,022 17,499 23,370 25,174 27,630 29,165 34,998 35,055 37,761 52,497 58,330 62,935 70,110 75,522 87,495 104,994 113,283 125,870 174,990 188,805 226,566 239,153 262,485 377,610 478,306 524,970 566,415 717,459 1,132,830 1,195,765 1,434,918 2,152,377 2,391,530 3,587,295 4,304,754 7,174,590 10,761,885 and 21,523,770, with no remainder.

Since 21,523,770 cannot be divided by just 1 and 21,523,770, 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).