21071261720

Names of 21071261720

• Cardinal: 21071261720 can be written as Twenty-one billion, seventy-one million, two hundred sixty-one thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.107126172 × 10¹⁰

Factors of 21071261720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 7665

Divisors of 21071261720

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 8 10 20 31 37 40 61 62 74 122 124 148 155 185 244 248 296 305 310 370 488 610 620 740 1147 1220 1240 1480 1891 2257 2294 2440 3782 4514 4588 5735 7529 7564 9028 9176 9455 11285 11470 15058 15128 18056 18910 22570 22940 30116 37645 37820 45140 45880 60232 69967 75290 75640 90280 139934 150580 233399 278573 279868 301160 349835 459269 466798 557146 559736 699670 918538 933596 1114292 1166995 1392865 1399340 1837076 1867192 2228584 2296345 2333990 2785730 2798680 3674152 4592690 4667980 5571460 8635763 9185380 9335960 11142920 14237339 16992953 17271526 18370760 28474678 33985906 34543052 43178815 56949356 67971812 69086104 71186695 84964765 86357630 113898712 135943624 142373390 169929530 172715260 284746780 339859060 345430520 526781543 569493560 679718120 1053563086 2107126172 2633907715 4214252344 5267815430 10535630860 21071261720
• Sum of all divisors σ(n): 51093158400
• Sum of proper divisors (its aliquot sum) s(n): 30021896680
• 21071261720 is an abundant number, because the sum of its proper divisors (30021896680) is greater than itself. Its abundance is 8950634960

Bases of 21071261720

• Binary: 10011100111111100011111000000011000₂
• Hexadecimal: 0x4E7F1F018
• Base-36: 9OHA9LK

Squares and roots of 21071261720

• 21071261720 squared (21071261720²) is 443998070472737358400
• 21071261720 cubed (21071261720³) is 9355599546106053003667840448000
• The square root of 21071261720 is 145159.4355183293
• The cube root of 21071261720 is 2762.0413781623

Scales and comparisons

• 21,071,261,720 seconds is equal to 670 years, 8 hours, 15 minutes, 20 seconds.
• To count from 1 to 21,071,261,720 would take you about one thousand, three hundred forty 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 21071261720 cubic inches would be around 230.2 feet tall.

Recreational maths with 21071261720

• 21071261720 backwards is 02716217012
• The number of decimal digits it has is: 11
• The sum of 21071261720's digits is 29
• More coming soon!