21618105390

Names of 21618105390

• Cardinal: 21618105390 can be written as Twenty-one billion, six hundred eighteen million, one hundred five thousand, three hundred ninety.

Scientific notation

• Scientific notation: 2.161810539 × 10¹⁰

Factors of 21618105390

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1920

Divisors of 21618105390

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 27 29 30 35 42 45 54 58 63 70 73 81 87 90 105 126 135 145 146 162 174 189 203 210 219 261 270 290 315 365 378 405 406 435 438 511 522 567 609 630 657 730 783 810 870 945 1015 1022 1095 1134 1218 1305 1314 1533 1566 1801 1827 1890 1971 2030 2117 2190 2349 2555 2610 2835 3045 3066 3285 3602 3654 3915 3942 4234 4599 4698 5110 5403 5481 5670 5913 6090 6351 6570 7665 7830 9005 9135 9198 9855 10585 10806 10962 11745 11826 12607 12702 13797 14819 15330 16209 16443 18010 18270 19053 19710 21170 22995 23490 25214 27015 27405 27594 29565 29638 31755 32418 32886 37821 38106 41391 44457 45990 48627 52229 54030 54810 57159 59130 63035 63510 68985 74095 75642 81045 82215 82782 88914 95265 97254 104458 113463 114318 126070 131473 133371 137970 145881 148190 156687 162090 164430 171477 189105 190530 206955 222285 226926 243135 261145 262946 266742 285795 291762 313374 340389 342954 365603 378210 394419 400113 413910 444570 470061 486270 522290 567315 571590 657365 666855 680778 729405 731206 783435 788838 800226 857385 920311 940122 1021167 1096809 1134630 1183257 1200339 1314730 1333710 1410183 1458810 1566870 1701945 1714770 1828015 1840622 1972095 2000565 2042334 2193618 2350305 2366514 2400678 2760933 2820366 3290427 3403890 3549771 3656030 3812717 3944190 4001130 4230549 4601555 4700610 5105835 5484045 5521866 5916285 6001695 6580854 7050915 7099542 7625434 8282799 8461098 9203110 9871281 10211670 10649313 10968090 11438151 11832570 12003390 13804665 14101830 16452135 16565598 17748855 19063585 19742562 21152745 21298626 22876302 24848397 26689019 27609330 29613843 32904270 34314453 35497710 38127170 41413995 42305490 49356405 49696794 53246565 53378038 57190755 59227686 68628906 74545191 80067057 82827990 98712810 102943359 106493130 114381510 124241985 133445095 148069215 149090382 160134114 171572265 205886718 240201171 248483970 266890190 296138430 308830077 343144530 372725955 400335285 480402342 514716795 617660154 720603513 745451910 800670570 1029433590 1201005855 1441207026 1544150385 2161810539 2402011710 3088300770 3603017565 4323621078 7206035130 10809052695 21618105390
• Sum of all divisors σ(n): 69703666560
• Sum of proper divisors (its aliquot sum) s(n): 48085561170
• 21618105390 is an abundant number, because the sum of its proper divisors (48085561170) is greater than itself. Its abundance is 26467455780

Bases of 21618105390

• Binary: 10100001000100010100001110000101110₂
• Hexadecimal: 0x5088A1C2E
• Base-36: 9XIV0VI

Squares and roots of 21618105390

• 21618105390 squared (21618105390²) is 467342480653147052100
• 21618105390 cubed (21618105390³) is 10103058999983769007465620819000
• The square root of 21618105390 is 147030.9674524383
• The cube root of 21618105390 is 2785.7312104127

Scales and comparisons

• 21,618,105,390 seconds is equal to 687 years, 20 weeks, 1 day, 13 hours, 16 minutes, 30 seconds.
• To count from 1 to 21,618,105,390 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 21618105390 cubic inches would be around 232.1 feet tall.

Recreational maths with 21618105390

• 21618105390 backwards is 09350181612
• The number of decimal digits it has is: 11
• The sum of 21618105390's digits is 36
• More coming soon!