21664731920

Names of 21664731920

• Cardinal: 21664731920 can be written as Twenty-one billion, six hundred sixty-four million, seven hundred thirty-one thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.166473192 × 10¹⁰

Factors of 21664731920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 51742

Divisors of 21664731920

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 31 40 52 62 65 80 104 124 130 155 169 208 248 260 310 338 403 496 520 620 676 806 845 1040 1240 1352 1612 1690 2015 2480 2704 3224 3380 4030 5239 6448 6760 8060 10478 13520 16120 20956 26195 32240 41912 51691 52390 83824 103382 104780 206764 209560 258455 413528 419120 516910 671983 827056 1033820 1343966 1602421 2067640 2687932 3204842 3359915 4135280 5375864 6409684 6719830 8012105 8735779 10751728 12819368 13439660 16024210 17471558 20831473 25638736 26879320 32048420 34943116 41662946 43678895 53758640 64096840 69886232 83325892 87357790 104157365 128193680 139772464 166651784 174715580 208314730 270809149 333303568 349431160 416629460 541618298 698862320 833258920 1083236596 1354045745 1666517840 2166473192 2708091490 4332946384 5416182980 10832365960 21664731920
• Sum of all divisors σ(n): 56303753472
• Sum of proper divisors (its aliquot sum) s(n): 34639021552
• 21664731920 is an abundant number, because the sum of its proper divisors (34639021552) is greater than itself. Its abundance is 12974289632

Bases of 21664731920

• Binary: 10100001011010100011001001100010000₂
• Hexadecimal: 0x50B519310
• Base-36: 9YAME4W

Squares and roots of 21664731920

• 21664731920 squared (21664731920²) is 469360609165466886400
• 21664731920 cubed (21664731920³) is 10168571771377735015493093888000
• The square root of 21664731920 is 147189.4422844247
• The cube root of 21664731920 is 2787.7325530609

Scales and comparisons

• 21,664,731,920 seconds is equal to 688 years, 45 weeks, 2 days, 5 hours, 5 minutes, 20 seconds.
• To count from 1 to 21,664,731,920 would take you about one thousand, three hundred seventy-seven 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 21664731920 cubic inches would be around 232.3 feet tall.

Recreational maths with 21664731920

• 21664731920 backwards is 02913746612
• The number of decimal digits it has is: 11
• The sum of 21664731920's digits is 41
• More coming soon!