21008891904

Names of 21008891904

• Cardinal: 21008891904 can be written as Twenty-one billion, eight million, eight hundred ninety-one thousand, nine hundred four.

Scientific notation

• Scientific notation: 2.1008891904 × 10¹⁰

Factors of 21008891904

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 20
• Sum of prime factors: 97

Divisors of 21008891904

• Number of divisors d(n): 720
• Complete list of divisors:
  1 2 3 4 6 7 8 11 12 13 14 16 21 22 24 26 28 32 33 39 42 44 48 49 52 56 61 64 66 77 78 84 88 91 96 98 104 112 122 128 132 143 147 154 156 168 176 182 183 192 196 208 224 231 244 256 264 273 286 294 308 312 336 352 364 366 384 392 416 427 429 448 462 488 512 528 539 546 572 588 616 624 637 671 672 704 728 732 768 784 793 832 854 858 896 924 976 1001 1024 1056 1078 1092 1144 1176 1232 1248 1274 1281 1342 1344 1408 1456 1464 1536 1568 1586 1617 1664 1708 1716 1792 1848 1911 1952 2002 2013 2048 2112 2156 2184 2288 2352 2379 2464 2496 2548 2562 2684 2688 2816 2912 2928 2989 3003 3072 3136 3172 3234 3328 3416 3432 3584 3696 3822 3904 4004 4026 4096 4224 4312 4368 4576 4697 4704 4758 4928 4992 5096 5124 5368 5376 5551 5632 5824 5856 5978 6006 6144 6272 6344 6468 6656 6832 6864 7007 7168 7392 7644 7808 8008 8052 8192 8448 8624 8723 8736 8967 9152 9394 9408 9516 9856 9984 10192 10248 10736 10752 11102 11264 11648 11712 11956 12012 12288 12544 12688 12936 13312 13664 13728 14014 14091 14336 14784 15288 15616 16016 16104 16384 16653 16896 17248 17446 17472 17934 18304 18788 18816 19032 19712 19968 20384 20496 21021 21472 21504 22204 22528 23296 23424 23912 24024 24576 25088 25376 25872 26169 26624 27328 27456 28028 28182 28672 29568 30576 31232 32032 32208 32879 33306 33792 34496 34892 34944 35868 36608 37576 37632 38064 38857 39424 39936 40768 40992 42042 42944 43008 44408 45056 46592 46848 47824 48048 49152 50176 50752 51744 52338 53248 54656 54912 56056 56364 57344 59136 61061 61152 62464 64064 64416 65758 66612 67584 68992 69784 69888 71736 73216 75152 75264 76128 77714 78848 79872 81536 81984 84084 85888 86016 88816 90112 93184 93696 95648 96096 98637 100352 101504 103488 104676 106496 109312 109824 112112 112728 114688 116571 118272 122122 122304 124928 128128 128832 131516 133224 135168 137984 139568 139776 143472 146432 150304 150528 152256 155428 157696 159744 163072 163968 168168 171776 172032 177632 180224 183183 186368 187392 191296 192192 197274 200704 203008 206976 209352 212992 218624 219648 224224 225456 233142 236544 244244 244608 249856 256256 257664 263032 266448 270336 275968 279136 279552 286944 292864 300608 301056 304512 310856 315392 319488 326144 327936 336336 343552 344064 355264 366366 372736 374784 382592 384384 394548 401408 406016 413952 418704 427427 437248 439296 448448 450912 466284 473088 488488 489216 499712 512512 515328 526064 532896 540672 551936 558272 559104 573888 585728 601216 602112 609024 621712 630784 638976 652288 655872 672672 687104 710528 732732 745472 749568 765184 768768 789096 802816 812032 827904 837408 854854 874496 878592 896896 901824 932568 946176 976976 978432 999424 1025024 1030656 1052128 1065792 1103872 1116544 1118208 1147776 1171456 1202432 1204224 1218048 1243424 1261568 1282281 1304576 1311744 1345344 1374208 1421056 1465464 1490944 1499136 1530368 1537536 1578192 1624064 1655808 1674816 1709708 1748992 1757184 1793792 1803648 1865136 1892352 1953952 1956864 2050048 2061312 2104256 2131584 2207744 2233088 2236416 2295552 2342912 2404864 2408448 2436096 2486848 2564562 2609152 2623488 2690688 2748416 2842112 2930928 2998272 3060736 3075072 3156384 3248128 3311616 3349632 3419416 3497984 3514368 3587584 3607296 3730272 3784704 3907904 3913728 4100096 4122624 4208512 4263168 4415488 4466176 4472832 4591104 4809728 4872192 4973696 5129124 5218304 5246976 5381376 5496832 5684224 5861856 6121472 6150144 6312768 6496256 6623232 6699264 6838832 6995968 7028736 7175168 7214592 7460544 7815808 7827456 8200192 8245248 8417024 8526336 8830976 8932352 9182208 9619456 9744384 9947392 10258248 10436608 10493952 10762752 10993664 11368448 11723712 12242944 12300288 12625536 12992512 13246464 13398528 13677664 14350336 14429184 14921088 15631616 15654912 16400384 16490496 16834048 17052672 17864704 18364416 19238912 19488768 19894784 20516496 20987904 21525504 22736896 23447424 24485888 24600576 25251072 26492928 26797056 27355328 28700672 28858368 29842176 31263232 31309824 32980992 33668096 34105344 35729408 36728832 38477824 38977536 39789568 41032992 43051008 45473792 46894848 48971776 49201152 50502144 53594112 54710656 57401344 57716736 59684352 62526464 67336192 68210688 71458816 73457664 76955648 79579136 82065984 86102016 90947584 93789696 101004288 107188224 109421312 114802688 115433472 119368704 125052928 134672384 136421376 142917632 146915328 159158272 164131968 172204032 187579392 202008576 214376448 218842624 230866944 238737408 250105856 269344768 272842752 318316544 328263936 344408064 375158784 404017152 428752896 437685248 477474816 500211712 538689536 636633088 656527872 750317568 808034304 875370496 954949632 1000423424 1313055744 1500635136 1616068608 1750740992 1909899264 2626111488 3001270272 3501481984 5252222976 7002963968 10504445952 21008891904
• Sum of all divisors σ(n): 77816644416
• Sum of proper divisors (its aliquot sum) s(n): 56807752512
• 21008891904 is an abundant number, because the sum of its proper divisors (56807752512) is greater than itself. Its abundance is 35798860608

Bases of 21008891904

• Binary: 10011100100001110100100000000000000₂
• Hexadecimal: 0x4E43A4000
• Base-36: 9NG5GQO

Squares and roots of 21008891904

• 21008891904 squared (21008891904²) is 441373539033956745216
• 21008891904 cubed (21008891904³) is 9272768970850321845654613131264
• The square root of 21008891904 is 144944.4441984583
• The cube root of 21008891904 is 2759.3135196707

Scales and comparisons

• 21,008,891,904 seconds is equal to 668 years, 6 days, 11 hours, 18 minutes, 24 seconds.
• To count from 1 to 21,008,891,904 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 21008891904 cubic inches would be around 229.9 feet tall.

Recreational maths with 21008891904

• 21008891904 backwards is 40919880012
• 21008891904 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21008891904's digits is 42
• More coming soon!