21613968390

Names of 21613968390

• Cardinal: 21613968390 can be written as Twenty-one billion, six hundred thirteen million, nine hundred sixty-eight thousand, three hundred ninety.

Scientific notation

• Scientific notation: 2.161396839 × 10¹⁰

Factors of 21613968390

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 8278

Divisors of 21613968390

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 21 30 35 42 70 71 105 142 181 210 213 355 362 426 497 543 710 905 994 1065 1086 1267 1491 1810 2130 2485 2534 2715 2982 3801 4970 5430 6335 7455 7602 8009 12670 12851 14910 16018 19005 24027 25702 38010 38553 40045 48054 56063 64255 77106 80090 89957 112126 120135 128510 168189 179914 192765 240270 269871 280315 336378 385530 449785 539742 560630 568639 840945 899570 1137278 1349355 1449629 1681890 1705917 2698710 2843195 2899258 3411834 3980473 4348887 5686390 7248145 7960946 8529585 8697774 10147403 11941419 14496290 17059170 19902365 20294806 21744435 23882838 30442209 39804730 43488870 50737015 59707095 60884418 101474030 102923659 119414190 152211045 205847318 304422090 308770977 514618295 617541954 720465613 1029236590 1440931226 1543854885 2161396839 3087709770 3602328065 4322793678 7204656130 10806984195 21613968390
• Sum of all divisors σ(n): 60458711040
• Sum of proper divisors (its aliquot sum) s(n): 38844742650
• 21613968390 is an abundant number, because the sum of its proper divisors (38844742650) is greater than itself. Its abundance is 17230774260

Bases of 21613968390

• Binary: 10100001000010010101111110000000110₂
• Hexadecimal: 0x5084AFC06
• Base-36: 9XGECQU

Squares and roots of 21613968390

• 21613968390 squared (21613968390²) is 467163629563919192100
• 21613968390 cubed (21613968390³) is 10097259922352218902563737719000
• The square root of 21613968390 is 147016.8983144453
• The cube root of 21613968390 is 2785.5534997235

Scales and comparisons

• 21,613,968,390 seconds is equal to 687 years, 13 weeks, 2 days, 16 hours, 6 minutes, 30 seconds.
• To count from 1 to 21,613,968,390 would take you about one thousand, three hundred seventy-four 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 21613968390 cubic inches would be around 232.1 feet tall.

Recreational maths with 21613968390

• 21613968390 backwards is 09386931612
• The number of decimal digits it has is: 11
• The sum of 21613968390's digits is 48
• More coming soon!