Q: Is 21,330,400 a Composite Number?

Why is 21,330,400 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 21,330,400 can be evenly divided by 1 2 4 5 7 8 10 13 14 16 20 25 26 28 32 35 40 50 52 56 65 70 80 91 100 104 112 130 140 160 175 182 200 208 224 260 280 293 325 350 364 400 416 455 520 560 586 650 700 728 800 910 1,040 1,120 1,172 1,300 1,400 1,456 1,465 1,820 2,051 2,080 2,275 2,344 2,600 2,800 2,912 2,930 3,640 3,809 4,102 4,550 4,688 5,200 5,600 5,860 7,280 7,325 7,618 8,204 9,100 9,376 10,255 10,400 11,720 14,560 14,650 15,236 16,408 18,200 19,045 20,510 23,440 26,663 29,300 30,472 32,816 36,400 38,090 41,020 46,880 51,275 53,326 58,600 60,944 65,632 72,800 76,180 82,040 95,225 102,550 106,652 117,200 121,888 133,315 152,360 164,080 190,450 205,100 213,304 234,400 266,630 304,720 328,160 380,900 410,200 426,608 533,260 609,440 666,575 761,800 820,400 853,216 1,066,520 1,333,150 1,523,600 1,640,800 2,133,040 2,666,300 3,047,200 4,266,080 5,332,600 10,665,200 and 21,330,400, with no remainder.

Since 21,330,400 cannot be divided by just 1 and 21,330,400, 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).