21205386020

Names of 21205386020

• Cardinal: 21205386020 can be written as Twenty-one billion, two hundred five million, three hundred eighty-six thousand and twenty.

Scientific notation

• Scientific notation: 2.120538602 × 10¹⁰

Factors of 21205386020

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 251

Divisors of 21205386020

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 5 7 10 13 14 20 26 28 35 49 52 65 70 73 91 98 130 140 146 151 182 196 245 260 292 302 364 365 455 490 511 604 637 730 755 910 949 980 1022 1057 1274 1460 1510 1820 1898 1963 2044 2114 2548 2555 3020 3185 3577 3796 3926 4228 4745 5110 5285 6370 6643 7154 7399 7852 9490 9815 10220 10570 11023 12740 13286 13741 14308 14798 17885 18980 19630 21140 22046 22801 26572 27482 29596 33215 35770 36995 39260 44092 45602 46501 54964 55115 66430 68705 71540 73990 77161 91204 93002 96187 110230 114005 132860 137410 143299 147980 154322 159607 186004 192374 220460 228010 232505 274820 286598 296413 308644 319214 384748 385805 456020 465010 480935 540127 573196 592826 638428 716495 771610 798035 930020 961870 1003093 1080254 1117249 1185652 1432990 1482065 1543220 1596070 1664473 1923740 2006186 2074891 2160508 2234498 2700635 2865980 2964130 3192140 3328946 4012372 4149782 4468996 5015465 5401270 5586245 5928260 6657892 7021651 8299564 8322365 10030930 10374455 10802540 11172490 11651311 14043302 14524237 16644730 20061860 20748910 21638149 22344980 23302622 28086604 29048474 33289460 35108255 41497820 43276298 46605244 58096948 58256555 70216510 72621185 81559177 86552596 108190745 116513110 140433020 145242370 151467043 163118354 216381490 233026220 290484740 302934086 326236708 407795885 432762980 605868172 757335215 815591770 1060269301 1514670430 1631183540 2120538602 3029340860 4241077204 5301346505 10602693010 21205386020
• Sum of all divisors σ(n): 56927663352
• Sum of proper divisors (its aliquot sum) s(n): 35722277332
• 21205386020 is an abundant number, because the sum of its proper divisors (35722277332) is greater than itself. Its abundance is 14516891312

Bases of 21205386020

• Binary: 10011101111111100001000001100100100₂
• Hexadecimal: 0x4EFF08324
• Base-36: 9QP50KK

Squares and roots of 21205386020

• 21205386020 squared (21205386020²) is 449668396257211440400
• 21205386020 cubed (21205386020³) is 9535391923628491802442223208000
• The square root of 21205386020 is 145620.6922796345
• The cube root of 21205386020 is 2767.8893686571

Scales and comparisons

• 21,205,386,020 seconds is equal to 674 years, 13 weeks, 5 days, 17 hours, 20 seconds.
• To count from 1 to 21,205,386,020 would take you about one thousand, three hundred forty-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 21205386020 cubic inches would be around 230.7 feet tall.

Recreational maths with 21205386020

• 21205386020 backwards is 02068350212
• The number of decimal digits it has is: 11
• The sum of 21205386020's digits is 29
• More coming soon!