21591991210

Names of 21591991210

• Cardinal: 21591991210 can be written as Twenty-one billion, five hundred ninety-one million, nine hundred ninety-one thousand, two hundred ten.

Scientific notation

• Scientific notation: 2.159199121 × 10¹⁰

Factors of 21591991210

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 337

Divisors of 21591991210

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 5 10 17 19 34 37 38 74 85 95 170 185 190 257 323 361 370 514 629 646 703 722 1258 1285 1369 1406 1615 1805 2570 2738 3145 3230 3515 3610 4369 4883 6137 6290 6845 7030 8738 9509 9766 11951 12274 13357 13690 19018 21845 23273 23902 24415 26011 26714 30685 43690 46546 47545 48830 52022 59755 61370 66785 83011 92777 95090 116365 119510 130055 133570 161653 166022 180671 185554 227069 232730 260110 323306 351833 361342 415055 442187 454138 463885 494209 703666 808265 830110 884374 903355 927770 988418 1135345 1577209 1616530 1759165 1806710 2210935 2270690 2471045 3071407 3154418 3432749 3518330 4421870 4942090 5981161 6142814 6684827 6865498 7886045 8401553 11962322 13369654 15357035 15772090 16803106 17163745 29905805 30714070 33424135 34327490 42007765 58356733 59811610 66848270 84015530 113642059 116713466 127011713 227284118 254023426 291783665 568210295 583567330 635058565 1136420590 1270117130 2159199121 4318398242 10795995605 21591991210
• Sum of all divisors σ(n): 44810912664
• Sum of proper divisors (its aliquot sum) s(n): 23218921454
• 21591991210 is an abundant number, because the sum of its proper divisors (23218921454) is greater than itself. Its abundance is 1626930244

Bases of 21591991210

• Binary: 10100000110111110111010001110101010₂
• Hexadecimal: 0x506FBA3AA
• Base-36: 9X3BB1M

Squares and roots of 21591991210

• 21591991210 squared (21591991210²) is 466214084412717264100
• 21591991210 cubed (21591991210³) is 10066490412617589178662448561000
• The square root of 21591991210 is 146942.1355840455
• The cube root of 21591991210 is 2784.6090584497

Scales and comparisons

• 21,591,991,210 seconds is equal to 686 years, 29 weeks, 7 hours, 20 minutes, 10 seconds.
• To count from 1 to 21,591,991,210 would take you about one thousand, three hundred seventy-three 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 21591991210 cubic inches would be around 232.1 feet tall.

Recreational maths with 21591991210

• 21591991210 backwards is 01219919512
• The number of decimal digits it has is: 11
• The sum of 21591991210's digits is 40
• More coming soon!