Q: Is 21,021,660 a Composite Number?

Why is 21,021,660 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 21,021,660 can be evenly divided by 1 2 3 4 5 6 9 10 11 12 15 18 20 22 27 30 33 36 44 45 54 55 60 66 90 99 108 110 132 135 165 180 198 220 270 297 330 396 495 540 594 660 990 1,188 1,485 1,980 2,970 3,539 5,940 7,078 10,617 14,156 17,695 21,234 31,851 35,390 38,929 42,468 53,085 63,702 70,780 77,858 95,553 106,170 116,787 127,404 155,716 159,255 191,106 194,645 212,340 233,574 318,510 350,361 382,212 389,290 467,148 477,765 583,935 637,020 700,722 778,580 955,530 1,051,083 1,167,870 1,401,444 1,751,805 1,911,060 2,102,166 2,335,740 3,503,610 4,204,332 5,255,415 7,007,220 10,510,830 and 21,021,660, with no remainder.

Since 21,021,660 cannot be divided by just 1 and 21,021,660, 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).