Q: Is 21,420,450 a Composite Number?

Why is 21,420,450 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 21,420,450 can be evenly divided by 1 2 3 5 6 9 10 15 18 25 27 30 41 43 45 50 54 75 81 82 86 90 123 129 135 150 162 205 215 225 243 246 258 270 369 387 405 410 430 450 486 615 645 675 738 774 810 1,025 1,075 1,107 1,161 1,215 1,230 1,290 1,350 1,763 1,845 1,935 2,025 2,050 2,150 2,214 2,322 2,430 3,075 3,225 3,321 3,483 3,526 3,690 3,870 4,050 5,289 5,535 5,805 6,075 6,150 6,450 6,642 6,966 8,815 9,225 9,675 9,963 10,449 10,578 11,070 11,610 12,150 15,867 16,605 17,415 17,630 18,450 19,350 19,926 20,898 26,445 27,675 29,025 31,734 33,210 34,830 44,075 47,601 49,815 52,245 52,890 55,350 58,050 79,335 83,025 87,075 88,150 95,202 99,630 104,490 132,225 142,803 158,670 166,050 174,150 238,005 249,075 261,225 264,450 285,606 396,675 428,409 476,010 498,150 522,450 714,015 793,350 856,818 1,190,025 1,428,030 2,142,045 2,380,050 3,570,075 4,284,090 7,140,150 10,710,225 and 21,420,450, with no remainder.

Since 21,420,450 cannot be divided by just 1 and 21,420,450, 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).