Q: Is 21,008,430 a Composite Number?

Why is 21,008,430 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 21,008,430 can be evenly divided by 1 2 3 5 6 9 10 15 17 18 23 27 30 34 45 46 51 54 69 85 90 102 115 135 138 153 170 199 207 230 255 270 306 345 391 398 414 459 510 597 621 690 765 782 918 995 1,035 1,173 1,194 1,242 1,530 1,791 1,955 1,990 2,070 2,295 2,346 2,985 3,105 3,383 3,519 3,582 3,910 4,577 4,590 5,373 5,865 5,970 6,210 6,766 7,038 8,955 9,154 10,149 10,557 10,746 11,730 13,731 16,915 17,595 17,910 20,298 21,114 22,885 26,865 27,462 30,447 33,830 35,190 41,193 45,770 50,745 52,785 53,730 60,894 68,655 77,809 82,386 91,341 101,490 105,570 123,579 137,310 152,235 155,618 182,682 205,965 233,427 247,158 304,470 389,045 411,930 456,705 466,854 617,895 700,281 778,090 913,410 1,167,135 1,235,790 1,400,562 2,100,843 2,334,270 3,501,405 4,201,686 7,002,810 10,504,215 and 21,008,430, with no remainder.

Since 21,008,430 cannot be divided by just 1 and 21,008,430, 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).