Q: Is 21,166,640 a Composite Number?

Why is 21,166,640 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 21,166,640 can be evenly divided by 1 2 4 5 8 10 11 16 20 22 40 44 55 67 80 88 110 134 176 220 268 335 359 440 536 670 718 737 880 1,072 1,340 1,436 1,474 1,795 2,680 2,872 2,948 3,590 3,685 3,949 5,360 5,744 5,896 7,180 7,370 7,898 11,792 14,360 14,740 15,796 19,745 24,053 28,720 29,480 31,592 39,490 48,106 58,960 63,184 78,980 96,212 120,265 157,960 192,424 240,530 264,583 315,920 384,848 481,060 529,166 962,120 1,058,332 1,322,915 1,924,240 2,116,664 2,645,830 4,233,328 5,291,660 10,583,320 and 21,166,640, with no remainder.

Since 21,166,640 cannot be divided by just 1 and 21,166,640, 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).