Q: Is 20,220,200 a Prime Number?

Why is 20,220,200 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 20220200 can be evenly divided by 1 2 4 5 7 8 10 11 13 14 20 22 25 26 28 35 40 44 50 52 55 56 65 70 77 88 91 100 101 104 110 130 140 143 154 175 182 200 202 220 260 275 280 286 308 325 350 364 385 404 440 455 505 520 550 572 616 650 700 707 715 728 770 808 910 1,001 1,010 1,100 1,111 1,144 1,300 1,313 1,400 1,414 1,430 1,540 1,820 1,925 2,002 2,020 2,200 2,222 2,275 2,525 2,600 2,626 2,828 2,860 3,080 3,535 3,575 3,640 3,850 4,004 4,040 4,444 4,550 5,005 5,050 5,252 5,555 5,656 5,720 6,565 7,070 7,150 7,700 7,777 8,008 8,888 9,100 9,191 10,010 10,100 10,504 11,110 13,130 14,140 14,300 14,443 15,400 15,554 17,675 18,200 18,382 20,020 20,200 22,220 25,025 26,260 27,775 28,280 28,600 28,886 31,108 32,825 35,350 36,764 38,885 40,040 44,440 45,955 50,050 52,520 55,550 57,772 62,216 65,650 70,700 72,215 73,528 77,770 91,910 100,100 101,101 111,100 115,544 131,300 141,400 144,430 155,540 183,820 194,425 200,200 202,202 222,200 229,775 262,600 288,860 311,080 361,075 367,640 388,850 404,404 459,550 505,505 577,720 722,150 777,700 808,808 919,100 1,011,010 1,444,300 1,555,400 1,838,200 2,022,020 2,527,525 2,888,600 4,044,040 5,055,050 10,110,100 and 20,220,200, with no remainder.

Since 20,220,200 cannot be divided by just 1 and 20,220,200, it is not a prime number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).