21008959440

Names of 21008959440

• Cardinal: 21008959440 can be written as Twenty-one billion, eight million, nine hundred fifty-nine thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.100895944 × 10¹⁰

Factors of 21008959440

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 820

Divisors of 21008959440

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 35 40 42 48 56 60 70 80 84 103 105 112 120 140 168 206 210 240 280 309 317 336 383 412 420 515 560 618 634 721 766 824 840 951 1030 1149 1236 1268 1442 1532 1545 1585 1648 1680 1902 1915 2060 2163 2219 2298 2472 2536 2681 2884 3064 3090 3170 3605 3804 3830 4120 4326 4438 4596 4755 4944 5072 5362 5745 5768 6128 6180 6340 6657 7210 7608 7660 8043 8240 8652 8876 9192 9510 10724 10815 11095 11490 11536 12360 12680 13314 13405 14420 15216 15320 16086 17304 17752 18384 19020 21448 21630 22190 22980 24720 25360 26628 26810 28840 30640 32172 32651 33285 34608 35504 38040 39449 40215 42896 43260 44380 45960 53256 53620 57680 64344 65302 66570 76080 78898 80430 86520 88760 91920 97953 106512 107240 118347 121411 128688 130604 133140 157796 160860 163255 173040 177520 195906 197245 214480 228557 236694 242822 261208 266280 276143 315592 321720 326510 364233 391812 394490 457114 473388 485644 489765 522416 532560 552286 591735 607055 631184 643440 653020 685671 728466 783624 788980 828429 849877 914228 946776 971288 979530 1104572 1142785 1183470 1214110 1306040 1371342 1380715 1456932 1567248 1577960 1656858 1699754 1821165 1828456 1893552 1942576 1959060 2209144 2285570 2366940 2428220 2549631 2612080 2742684 2761430 2913864 3155920 3313716 3399508 3428355 3642330 3656912 3918120 4142145 4249385 4418288 4571140 4733880 4856440 5099262 5485368 5522860 5827728 6627432 6799016 6856710 7284660 7836240 8284290 8498770 9142280 9467760 9712880 10198524 10970736 11045720 12505333 12748155 13254864 13598032 13713420 14569320 16568580 16997540 18284560 20397048 22091440 25010666 25496310 27426840 29138640 33137160 33995080 37515999 40794096 50021332 50992620 54853680 62526665 66274320 67990160 75031998 87537331 100042664 101985240 125053330 150063996 175074662 187579995 200085328 203970480 250106660 262611993 300127992 350149324 375159990 437686655 500213320 525223986 600255984 700298648 750319980 875373310 1000426640 1050447972 1313059965 1400597296 1500639960 1750746620 2100895944 2626119930 3001279920 3501493240 4201791888 5252239860 7002986480 10504479720 21008959440
• Sum of all divisors σ(n): 75588304896
• Sum of proper divisors (its aliquot sum) s(n): 54579345456
• 21008959440 is an abundant number, because the sum of its proper divisors (54579345456) is greater than itself. Its abundance is 33570386016

Bases of 21008959440

• Binary: 10011100100001110110100011111010000₂
• Hexadecimal: 0x4E43B47D0
• Base-36: 9NG6WUO

Squares and roots of 21008959440

• 21008959440 squared (21008959440²) is 441376376751565113600
• 21008959440 cubed (21008959440³) is 9272858396947790428141392384000
• The square root of 21008959440 is 144944.6771702913
• The cube root of 21008959440 is 2759.3164763997

Scales and comparisons

• 21,008,959,440 seconds is equal to 668 years, 1 week, 6 hours, 4 minutes.
• To count from 1 to 21,008,959,440 would take you about one thousand, three hundred thirty-six 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 21008959440 cubic inches would be around 229.9 feet tall.

Recreational maths with 21008959440

• 21008959440 backwards is 04495980012
• 21008959440 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21008959440's digits is 42
• More coming soon!