Q: Is 21,247,700 a Composite Number?

Why is 21,247,700 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 21,247,700 can be evenly divided by 1 2 4 5 10 19 20 25 38 50 53 76 95 100 106 190 211 212 265 380 422 475 530 844 950 1,007 1,055 1,060 1,325 1,900 2,014 2,110 2,650 4,009 4,028 4,220 5,035 5,275 5,300 8,018 10,070 10,550 11,183 16,036 20,045 20,140 21,100 22,366 25,175 40,090 44,732 50,350 55,915 80,180 100,225 100,700 111,830 200,450 212,477 223,660 279,575 400,900 424,954 559,150 849,908 1,062,385 1,118,300 2,124,770 4,249,540 5,311,925 10,623,850 and 21,247,700, with no remainder.

Since 21,247,700 cannot be divided by just 1 and 21,247,700, 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).