21365721520

Names of 21365721520

• Cardinal: 21365721520 can be written as Twenty-one billion, three hundred sixty-five million, seven hundred twenty-one thousand, five hundred twenty.

Scientific notation

• Scientific notation: 2.136572152 × 10¹⁰

Factors of 21365721520

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4125

Divisors of 21365721520

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 4 5 8 10 11 13 16 20 22 26 40 44 52 55 65 80 88 104 110 130 143 176 208 220 260 286 440 520 523 572 715 880 1040 1046 1144 1430 2092 2288 2615 2860 3571 4184 5230 5720 5753 6799 7142 8368 10460 11440 11506 13598 14284 17855 20920 23012 27196 28568 28765 33995 35710 39281 41840 46024 46423 54392 57136 57530 67990 71420 74789 78562 92048 92846 108784 115060 135980 142840 149578 157124 185692 196405 230120 232115 271960 285680 299156 314248 371384 373945 392810 460240 464230 510653 543920 598312 628496 742768 747890 785620 928460 1021306 1196624 1495780 1571240 1856920 1867633 2042612 2553265 2991560 3142480 3713840 3735266 4085224 5106530 5983120 7470532 8170448 9338165 10213060 14941064 18676330 20426120 20543963 24279229 29882128 37352660 40852240 41087926 48558458 74705320 82175852 97116916 102719815 121396145 149410640 164351704 194233832 205439630 242792290 267071519 328703408 388467664 410879260 485584580 534143038 821758520 971169160 1068286076 1335357595 1643517040 1942338320 2136572152 2670715190 4273144304 5341430380 10682860760 21365721520
• Sum of all divisors σ(n): 58487756544
• Sum of proper divisors (its aliquot sum) s(n): 37122035024
• 21365721520 is an abundant number, because the sum of its proper divisors (37122035024) is greater than itself. Its abundance is 15756313504

Bases of 21365721520

• Binary: 10011111001011111110000100110110000₂
• Hexadecimal: 0x4F97F09B0
• Base-36: 9TCLK8G

Squares and roots of 21365721520

• 21365721520 squared (21365721520²) is 456494056070191110400
• 21365721520 cubed (21365721520³) is 9753324877530968837985975808000
• The square root of 21365721520 is 146170.1799957843
• The cube root of 21365721520 is 2774.8479323645

Scales and comparisons

• 21,365,721,520 seconds is equal to 679 years, 18 weeks, 6 days, 10 hours, 38 minutes, 40 seconds.
• To count from 1 to 21,365,721,520 would take you about one thousand, three hundred fifty-eight years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21365721520 cubic inches would be around 231.2 feet tall.

Recreational maths with 21365721520

• 21365721520 backwards is 02512756312
• The number of decimal digits it has is: 11
• The sum of 21365721520's digits is 34
• More coming soon!