21081630640

Names of 21081630640

• Cardinal: 21081630640 can be written as Twenty-one billion, eighty-one million, six hundred thirty thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.108163064 × 10¹⁰

Factors of 21081630640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1125

Divisors of 21081630640

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 17 20 28 34 35 40 43 49 56 68 70 80 85 86 98 112 119 136 140 170 172 196 215 238 245 272 280 301 340 343 344 392 430 476 490 560 595 602 680 686 688 731 784 833 860 952 980 1051 1190 1204 1360 1372 1462 1505 1666 1715 1720 1904 1960 2102 2107 2380 2408 2744 2924 3010 3332 3430 3440 3655 3920 4165 4204 4214 4760 4816 5117 5255 5488 5831 5848 6020 6664 6860 7310 7357 8330 8408 8428 9520 10234 10510 10535 11662 11696 12040 13328 13720 14620 14714 14749 16660 16816 16856 17867 20468 21020 21070 23324 24080 25585 27440 29155 29240 29428 29498 33320 33712 35734 35819 36785 40936 42040 42140 45193 46648 51170 51499 58310 58480 58856 58996 66640 71468 71638 73570 73745 81872 84080 84280 89335 90386 93296 102340 102998 116620 117712 117992 125069 142936 143276 147140 147490 168560 178670 179095 180772 204680 205996 225965 233240 235984 250138 250733 257495 285872 286552 294280 294980 316351 357340 358190 360493 361544 409360 411992 451930 466480 500276 501466 514990 573104 588560 589960 625345 632702 714680 716380 720986 723088 768281 823984 875483 903860 1000552 1002932 1029980 1179920 1250690 1253665 1265404 1429360 1432760 1441972 1536562 1581755 1750966 1802465 1807720 2001104 2005864 2059960 2214457 2501380 2507330 2530808 2865520 2883944 3073124 3163510 3501932 3604930 3615440 3841405 4011728 4119920 4377415 4428914 5002760 5014660 5061616 5377967 5767888 6128381 6146248 6327020 7003864 7209860 7682810 8754830 8857828 10005520 10029320 10755934 11072285 12256762 12292496 12654040 14007728 14419720 15365620 15501199 17509660 17715656 20058640 21511868 22144570 24513524 25308080 26889835 28839440 30641905 30731240 31002398 35019320 35431312 37645769 43023736 44289140 49027048 53779670 61283810 61462480 62004796 70038640 75291538 77505995 86047472 88578280 98054096 107559340 122567620 124009592 150583076 155011990 177156560 188228845 215118680 245135240 248019184 263520383 301166152 310023980 376457690 430237360 490270480 527040766 602332304 620047960 752915380 1054081532 1240095920 1317601915 1505830760 2108163064 2635203830 3011661520 4216326128 5270407660 10540815320 21081630640
• Sum of all divisors σ(n): 61988889600
• Sum of proper divisors (its aliquot sum) s(n): 40907258960
• 21081630640 is an abundant number, because the sum of its proper divisors (40907258960) is greater than itself. Its abundance is 19825628320

Bases of 21081630640

• Binary: 10011101000100100000010011110110000₂
• Hexadecimal: 0x4E89027B0
• Base-36: 9ONGIB4

Squares and roots of 21081630640

• 21081630640 squared (21081630640²) is 444435150441386809600
• 21081630640 cubed (21081630640³) is 9369417685038149689355206144000
• The square root of 21081630640 is 145195.1467508469
• The cube root of 21081630640 is 2762.4943598911

Scales and comparisons

• 21,081,630,640 seconds is equal to 670 years, 17 weeks, 1 day, 8 hours, 30 minutes, 40 seconds.
• To count from 1 to 21,081,630,640 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 21081630640 cubic inches would be around 230.2 feet tall.

Recreational maths with 21081630640

• 21081630640 backwards is 04603618012
• The number of decimal digits it has is: 11
• The sum of 21081630640's digits is 31
• More coming soon!