21000027840

Names of 21000027840

• Cardinal: 21000027840 can be written as Twenty-one billion, twenty-seven thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.100002784 × 10¹⁰

Factors of 21000027840

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 886

Divisors of 21000027840

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 32 33 37 40 44 48 55 60 64 66 71 74 80 88 96 110 111 120 132 142 148 160 165 176 185 192 213 220 222 240 264 284 296 320 330 352 355 370 407 426 440 444 480 528 555 568 592 660 704 710 740 757 781 814 852 880 888 960 1056 1065 1110 1136 1184 1221 1320 1420 1480 1514 1562 1628 1704 1760 1776 2035 2112 2130 2220 2271 2272 2343 2368 2442 2627 2640 2840 2960 3028 3124 3256 3408 3520 3552 3785 3905 4070 4260 4440 4542 4544 4686 4884 5254 5280 5680 5920 6056 6105 6248 6512 6816 7104 7570 7810 7881 8140 8327 8520 8880 9084 9372 9768 10508 10560 11355 11360 11715 11840 12112 12210 12496 13024 13135 13632 15140 15620 15762 16280 16654 17040 17760 18168 18744 19536 21016 22710 22720 23430 24224 24420 24981 24992 26048 26270 28009 28897 30280 31240 31524 32560 33308 34080 35520 36336 37488 39072 39405 41635 42032 45420 46860 48448 48840 49962 49984 52540 53747 56018 57794 60560 62480 63048 65120 66616 68160 72672 74976 78144 78810 83270 84027 84064 86691 90840 93720 97680 99924 105080 107494 112036 115588 121120 124905 124960 126096 130240 133232 140045 144485 145344 149952 157620 161241 166540 168054 168128 173382 181680 187440 195360 199848 210160 214988 224072 231176 242240 249810 249920 252192 266464 268735 280090 288970 308099 315240 322482 333080 336108 346764 363360 374880 390720 399696 420135 420320 429976 433455 448144 462352 499620 504384 532928 537470 560180 577940 591217 616198 630480 644964 666160 672216 693528 726720 749760 799392 806205 840270 840640 859952 866910 896288 924297 924704 999240 1074940 1120360 1155880 1182434 1232396 1260960 1289928 1332320 1344432 1387056 1540495 1598784 1612410 1680540 1719904 1733820 1773651 1792576 1848594 1849408 1988639 1998480 2149880 2240720 2311760 2364868 2464792 2521920 2579856 2664640 2688864 2774112 2956085 3080990 3224820 3361080 3439808 3467640 3547302 3697188 3977278 3996960 4299760 4481440 4621485 4623520 4729736 4929584 5159712 5377728 5548224 5912170 5965917 6161980 6449640 6722160 6935280 7094604 7394376 7954556 7993920 8599520 8868255 8962880 9242970 9247040 9459472 9859168 9943195 10319424 11824340 11931834 12323960 12899280 13444320 13870560 14189208 14788752 15909112 17199040 17736510 18485940 18918944 19718336 19886390 21875029 23648680 23863668 24647920 25798560 26888640 27741120 28378416 29577504 29829585 31818224 35473020 36971880 37837888 39772780 43750058 47297360 47727336 49295840 51597120 56756832 59155008 59659170 63636448 65625087 70946040 73943760 79545560 87500116 94594720 95454672 98591680 109375145 113513664 119318340 127272896 131250174 141892080 147887520 159091120 175000232 189189440 190909344 218750290 238636680 262500348 283784160 295775040 318182240 328125435 350000464 381818688 437500580 477273360 525000696 567568320 636364480 656250870 700000928 875001160 954546720 1050001392 1312501740 1400001856 1750002320 1909093440 2100002784 2625003480 3500004640 4200005568 5250006960 7000009280 10500013920 21000027840
• Sum of all divisors σ(n): 75854527488
• Sum of proper divisors (its aliquot sum) s(n): 54854499648
• 21000027840 is an abundant number, because the sum of its proper divisors (54854499648) is greater than itself. Its abundance is 33854471808

Bases of 21000027840

• Binary: 10011100011101100101111111011000000₂
• Hexadecimal: 0x4E3B2FEC0
• Base-36: 9NAVH6O

Squares and roots of 21000027840

• 21000027840 squared (21000027840²) is 441001169280775065600
• 21000027840 cubed (21000027840³) is 9261036832368829154377826304000
• The square root of 21000027840 is 144913.8635189883
• The cube root of 21000027840 is 2758.9253955623

Scales and comparisons

• 21,000,027,840 seconds is equal to 667 years, 38 weeks, 1 day, 21 hours, 4 minutes.
• To count from 1 to 21,000,027,840 would take you about one thousand, three hundred thirty-five 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 21000027840 cubic inches would be around 229.9 feet tall.

Recreational maths with 21000027840

• 21000027840 backwards is 04872000012
• 21000027840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21000027840's digits is 24
• More coming soon!