Q: Is 21,371,850 a Composite Number?

Why is 21,371,850 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 21,371,850 can be evenly divided by 1 2 3 5 6 9 10 15 18 25 27 30 45 50 54 75 81 90 135 150 162 225 243 270 405 450 486 675 810 1,215 1,350 1,759 2,025 2,430 3,518 4,050 5,277 6,075 8,795 10,554 12,150 15,831 17,590 26,385 31,662 43,975 47,493 52,770 79,155 87,950 94,986 131,925 142,479 158,310 237,465 263,850 284,958 395,775 427,437 474,930 712,395 791,550 854,874 1,187,325 1,424,790 2,137,185 2,374,650 3,561,975 4,274,370 7,123,950 10,685,925 and 21,371,850, with no remainder.

Since 21,371,850 cannot be divided by just 1 and 21,371,850, 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).