21241391808

Names of 21241391808

• Cardinal: 21241391808 can be written as Twenty-one billion, two hundred forty-one million, three hundred ninety-one thousand, eight hundred eight.

Scientific notation

• Scientific notation: 2.1241391808 × 10¹⁰

Factors of 21241391808

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 645

Divisors of 21241391808

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 6 7 8 12 13 14 16 21 24 26 28 32 39 42 43 48 49 52 56 64 78 84 86 91 96 98 104 112 129 147 156 168 172 182 192 196 208 224 258 273 294 301 312 336 343 344 364 392 416 448 516 546 559 577 588 602 624 637 672 686 688 728 784 832 903 1029 1032 1092 1118 1154 1176 1204 1248 1274 1344 1372 1376 1456 1568 1677 1731 1806 1911 2058 2064 2107 2184 2236 2308 2352 2408 2496 2548 2744 2752 2912 3136 3354 3462 3612 3822 3913 4039 4116 4128 4214 4368 4459 4472 4616 4704 4816 5096 5488 5824 6321 6708 6924 7224 7501 7644 7826 8078 8232 8256 8428 8736 8918 8944 9232 9408 9632 10192 10976 11739 12117 12642 13377 13416 13848 14448 14749 15002 15288 15652 16156 16464 16856 17472 17836 17888 18464 19264 20384 21952 22503 23478 24234 24811 25284 26754 26832 27391 27696 28273 28896 29498 30004 30576 31304 32312 32928 33712 35672 35776 36928 40768 44247 45006 46956 48468 49622 50568 52507 53508 53664 54782 55392 56546 57792 58996 60008 61152 62608 64624 65856 67424 71344 74433 82173 84819 88494 90012 93912 96936 99244 101136 105014 107016 107328 109564 110784 113092 117992 120016 122304 125216 129248 134848 142688 148866 157521 164346 169638 173677 176988 180024 187824 191737 193872 197911 198488 202272 210028 214032 219128 226184 235984 240032 250432 258496 285376 297732 315042 322543 328692 339276 347354 353976 360048 367549 375648 383474 387744 395822 396976 404544 420056 428064 438256 452368 471968 480064 521031 575211 593733 595464 630084 645086 657384 678552 694708 707952 720096 735098 751296 766948 775488 791644 793952 840112 856128 876512 904736 943936 967629 1042062 1102647 1150422 1187466 1190928 1215739 1260168 1290172 1314768 1357104 1389416 1415904 1440192 1470196 1533896 1583288 1587904 1680224 1753024 1809472 1935258 2084124 2205294 2257801 2300844 2374932 2381856 2431478 2520336 2572843 2580344 2629536 2714208 2778832 2831808 2940392 3067792 3166576 3360448 3647217 3870516 4168248 4410588 4515602 4601688 4749864 4763712 4862956 5040672 5145686 5160688 5259072 5428416 5557664 5880784 6135584 6333152 6773403 7294434 7718529 7741032 8336496 8510173 8821176 9031204 9203376 9499728 9725912 10081344 10291372 10321376 11115328 11761568 12271168 12666304 13546806 14588868 15437058 15482064 15804607 16672992 17020346 17642352 18062408 18406752 18999456 19451824 20582744 20642752 23523136 25530519 27093612 29177736 30874116 30964128 31609214 33345984 34040692 35284704 36124816 36813504 37998912 38903648 41165488 47413821 51061038 54187224 58355472 61748232 61928256 63218428 68081384 70569408 72249632 77807296 82330976 94827642 102122076 108374448 110632249 116710944 123496464 126436856 136162768 144499264 164661952 189655284 204244152 216748896 221264498 233421888 246992928 252873712 272325536 331896747 379310568 408488304 433497792 442528996 493985856 505747424 544651072 663793494 758621136 816976608 885057992 1011494848 1327586988 1517242272 1633953216 1770115984 2655173976 3034484544 3540231968 5310347952 7080463936 10620695904 21241391808
• Sum of all divisors σ(n): 72348953600
• Sum of proper divisors (its aliquot sum) s(n): 51107561792
• 21241391808 is an abundant number, because the sum of its proper divisors (51107561792) is greater than itself. Its abundance is 29866169984

Bases of 21241391808

• Binary: 10011110010000101011110101011000000₂
• Hexadecimal: 0x4F215EAC0
• Base-36: 9RAKQTC

Squares and roots of 21241391808

• 21241391808 squared (21241391808²) is 451196725940969508864
• 21241391808 cubed (21241391808³) is 9584046438198930817161552986112
• The square root of 21241391808 is 145744.2685253867
• The cube root of 21241391808 is 2769.4550665541

Scales and comparisons

• 21,241,391,808 seconds is equal to 675 years, 21 weeks, 2 days, 10 hours, 36 minutes, 48 seconds.
• To count from 1 to 21,241,391,808 would take you about one thousand, three hundred fifty 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 21241391808 cubic inches would be around 230.8 feet tall.

Recreational maths with 21241391808

• 21241391808 backwards is 80819314212
• 21241391808 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21241391808's digits is 39
• More coming soon!