Q: Is 21,268,620 a Composite Number?

Why is 21,268,620 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 21,268,620 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 173 180 346 519 683 692 865 1,038 1,366 1,557 1,730 2,049 2,076 2,595 2,732 3,114 3,415 3,460 4,098 5,190 6,147 6,228 6,830 7,785 8,196 10,245 10,380 12,294 13,660 15,570 20,490 24,588 30,735 31,140 40,980 61,470 118,159 122,940 236,318 354,477 472,636 590,795 708,954 1,063,431 1,181,590 1,417,908 1,772,385 2,126,862 2,363,180 3,544,770 4,253,724 5,317,155 7,089,540 10,634,310 and 21,268,620, with no remainder.

Since 21,268,620 cannot be divided by just 1 and 21,268,620, 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).