21705039720

Names of 21705039720

• Cardinal: 21705039720 can be written as Twenty-one billion, seven hundred five million, thirty-nine thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.170503972 × 10¹⁰

Factors of 21705039720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1120

Divisors of 21705039720

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 18 20 21 24 26 27 28 30 35 36 39 40 42 45 52 54 56 60 63 65 70 72 78 84 90 91 104 105 108 117 120 126 130 135 140 156 168 180 182 189 195 210 216 234 252 260 269 270 273 280 312 315 351 360 364 378 390 420 455 468 504 520 538 540 546 585 630 702 728 756 780 807 819 821 840 910 936 945 1076 1080 1092 1170 1260 1345 1365 1404 1512 1560 1614 1638 1642 1755 1820 1883 1890 2152 2184 2340 2421 2457 2463 2520 2690 2730 2808 3228 3276 3284 3497 3510 3640 3766 3780 4035 4095 4105 4680 4842 4914 4926 5380 5460 5649 5747 6456 6552 6568 6994 7020 7263 7389 7532 7560 8070 8190 8210 9415 9684 9828 9852 10491 10673 10760 10920 11298 11494 12105 12285 12315 13988 14040 14526 14778 15064 16140 16380 16420 16947 17241 17485 18830 19368 19656 19704 20982 21346 22167 22596 22988 24210 24479 24570 24630 27976 28245 28735 29052 29556 31473 32019 32280 32760 32840 33894 34482 34970 36315 36945 37660 41964 42692 44334 45192 45976 48420 48958 49140 49260 50841 51723 52455 53365 56490 57470 58104 59112 62946 64038 67788 68964 69940 72630 73437 73890 74711 75320 83928 84735 85384 86205 88668 94419 96057 96840 97916 98280 98520 101682 103446 104910 106730 110835 112980 114940 122395 125892 128076 135576 137928 139880 145260 146874 147780 149422 155169 157365 160095 169470 172410 177336 188838 192114 195832 203364 206892 209820 213460 220311 220849 221670 224133 225960 229880 244790 251784 254205 256152 258615 288171 290520 293748 295560 298844 310338 314730 320190 338940 344820 367185 373555 377676 384228 406728 413784 419640 426920 440622 441698 443340 448266 472095 480285 489580 508410 517230 576342 587496 597688 620676 629460 640380 660933 662547 672399 677880 689640 734370 747110 755352 768456 775845 881244 883396 886680 896532 944190 960570 979160 1016820 1034460 1101555 1104245 1120665 1152684 1241352 1258920 1280760 1321866 1325094 1344798 1440855 1468740 1494220 1545943 1551690 1762488 1766792 1793064 1888380 1921140 1987641 2017197 2033640 2068920 2203110 2208490 2241330 2305368 2643732 2650188 2689596 2871037 2881710 2937480 2988440 3091886 3103380 3304665 3312735 3361995 3776760 3842280 3975282 4034394 4406220 4416980 4482660 4637829 5287464 5300376 5379192 5742074 5763420 5962923 6183772 6206760 6609330 6625470 6723990 7729715 7950564 8068788 8613111 8812440 8833960 8965320 9275658 9938205 10085985 11484148 11526840 11925846 12367544 13218660 13250940 13447980 13913487 14355185 15459430 15901128 16137576 17226222 18551316 19876410 20097259 20171970 22968296 23189145 23851692 25839333 26437320 26501880 26895960 27826974 28710370 29814615 30918860 34452444 37102632 39752820 40194518 40343940 41740461 43065555 46378290 47703384 51678666 55653948 57420740 59629230 60291777 61837720 68904888 69567435 77517999 79505640 80389036 80687880 83480922 86131110 92756580 100486295 103357332 111307896 114841480 119258460 120583554 129196665 139134870 155035998 160778072 166961844 172262220 180875331 185513160 200972590 206714664 208702305 238516920 241167108 258393330 278269740 301458885 310071996 333923688 344524440 361750662 387589995 401945180 417404610 482334216 516786660 542625993 556539480 602917770 620143992 723501324 775179990 803890360 834809220 904376655 1033573320 1085251986 1205835540 1447002648 1550359980 1669618440 1808753310 2170503972 2411671080 2713129965 3100719960 3617506620 4341007944 5426259930 7235013240 10852519860 21705039720
• Sum of all divisors σ(n): 89486208000
• Sum of proper divisors (its aliquot sum) s(n): 67781168280
• 21705039720 is an abundant number, because the sum of its proper divisors (67781168280) is greater than itself. Its abundance is 46076128560

Bases of 21705039720

• Binary: 10100001101101110001001111101101000₂
• Hexadecimal: 0x50DB89F68
• Base-36: 9YYMBU0

Squares and roots of 21705039720

• 21705039720 squared (21705039720²) is 471108749246777678400
• 21705039720 cubed (21705039720³) is 10225434114840829591681386048000
• The square root of 21705039720 is 147326.3035577827
• The cube root of 21705039720 is 2789.4603650503

Scales and comparisons

• 21,705,039,720 seconds is equal to 690 years, 7 weeks, 6 days, 17 hours, 42 minutes.
• To count from 1 to 21,705,039,720 would take you about one thousand, three hundred eighty 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 21705039720 cubic inches would be around 232.5 feet tall.

Recreational maths with 21705039720

• 21705039720 backwards is 02793050712
• 21705039720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21705039720's digits is 36
• More coming soon!