Q: Is 21,021,120 a Composite Number?

Why is 21,021,120 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 21,021,120 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 64 72 80 81 90 96 108 120 135 144 160 162 180 192 216 240 270 288 320 324 360 405 432 480 540 576 648 720 810 811 864 960 1,080 1,296 1,440 1,620 1,622 1,728 2,160 2,433 2,592 2,880 3,240 3,244 4,055 4,320 4,866 5,184 6,480 6,488 7,299 8,110 8,640 9,732 12,165 12,960 12,976 14,598 16,220 19,464 21,897 24,330 25,920 25,952 29,196 32,440 36,495 38,928 43,794 48,660 51,904 58,392 64,880 65,691 72,990 77,856 87,588 97,320 109,485 116,784 129,760 131,382 145,980 155,712 175,176 194,640 218,970 233,568 259,520 262,764 291,960 328,455 350,352 389,280 437,940 467,136 525,528 583,920 656,910 700,704 778,560 875,880 1,051,056 1,167,840 1,313,820 1,401,408 1,751,760 2,102,112 2,335,680 2,627,640 3,503,520 4,204,224 5,255,280 7,007,040 10,510,560 and 21,021,120, with no remainder.

Since 21,021,120 cannot be divided by just 1 and 21,021,120, 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).