Q: Is 21,435,400 a Composite Number?

Why is 21,435,400 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 21,435,400 can be evenly divided by 1 2 4 5 7 8 10 14 20 25 28 35 40 50 56 61 70 100 122 140 175 200 244 251 280 305 350 427 488 502 610 700 854 1,004 1,220 1,255 1,400 1,525 1,708 1,757 2,008 2,135 2,440 2,510 3,050 3,416 3,514 4,270 5,020 6,100 6,275 7,028 8,540 8,785 10,040 10,675 12,200 12,550 14,056 15,311 17,080 17,570 21,350 25,100 30,622 35,140 42,700 43,925 50,200 61,244 70,280 76,555 85,400 87,850 107,177 122,488 153,110 175,700 214,354 306,220 351,400 382,775 428,708 535,885 612,440 765,550 857,416 1,071,770 1,531,100 2,143,540 2,679,425 3,062,200 4,287,080 5,358,850 10,717,700 and 21,435,400, with no remainder.

Since 21,435,400 cannot be divided by just 1 and 21,435,400, 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).