21085790400

Names of 21085790400

• Cardinal: 21085790400 can be written as Twenty-one billion, eighty-five million, seven hundred ninety thousand, four hundred.

Scientific notation

• Scientific notation: 2.10857904 × 10¹⁰

Factors of 21085790400

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 484

Divisors of 21085790400

• Number of divisors d(n): 504
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 27 30 32 36 40 45 48 50 54 60 64 72 75 80 81 90 96 100 108 120 135 144 150 160 162 180 192 193 200 216 225 240 243 270 281 288 300 320 324 360 386 400 405 432 450 480 486 540 562 576 579 600 648 675 720 772 800 810 843 864 900 960 965 972 1080 1124 1158 1200 1215 1296 1350 1405 1440 1544 1600 1620 1686 1728 1737 1800 1930 1944 2025 2160 2248 2316 2400 2430 2529 2592 2700 2810 2880 2895 3088 3240 3372 3474 3600 3860 3888 4050 4215 4320 4496 4632 4800 4825 4860 5058 5184 5211 5400 5620 5790 6075 6176 6480 6744 6948 7025 7200 7587 7720 7776 8100 8430 8640 8685 8992 9264 9650 9720 10116 10422 10800 11240 11580 12150 12352 12645 12960 13488 13896 14050 14400 14475 15174 15440 15552 15633 16200 16860 17370 17984 18528 19300 19440 20232 20844 21075 21600 22480 22761 23160 24300 25290 25920 26055 26976 27792 28100 28950 30348 30880 31266 32400 33720 34740 37056 37935 38600 38880 40464 41688 42150 43200 43425 44960 45522 46320 46899 48600 50580 52110 53952 54233 55584 56200 57900 60696 61760 62532 63225 64800 67440 68283 69480 75870 77200 77760 78165 80928 83376 84300 86850 89920 91044 92640 93798 97200 101160 104220 108466 111168 112400 113805 115800 121392 125064 126450 129600 130275 134880 136566 138960 151740 154400 156330 161856 162699 166752 168600 173700 182088 185280 187596 189675 194400 202320 208440 216932 224800 227610 231600 234495 242784 250128 252900 260550 269760 271165 273132 277920 303480 308800 312660 325398 333504 337200 341415 347400 364176 375192 379350 388800 390825 404640 416880 433864 449600 455220 463200 468990 485568 488097 500256 505800 521100 542330 546264 555840 569025 606960 625320 650796 674400 682830 694800 728352 750384 758700 781650 809280 813495 833760 867728 910440 926400 937980 976194 1000512 1011600 1042200 1084660 1092528 1138050 1172475 1213920 1250640 1301592 1348800 1355825 1365660 1389600 1456704 1464291 1500768 1517400 1563300 1626990 1667520 1707075 1735456 1820880 1875960 1952388 2023200 2084400 2169320 2185056 2276100 2344950 2427840 2440485 2501280 2603184 2711650 2731320 2779200 2928582 3001536 3034800 3126600 3253980 3414150 3470912 3641760 3751920 3904776 4046400 4067475 4168800 4338640 4370112 4392873 4552200 4689900 4880970 5002560 5206368 5423300 5462640 5857164 6069600 6253200 6507960 6828300 7283520 7321455 7503840 7809552 8134950 8337600 8677280 8785746 9104400 9379800 9761940 10412736 10846600 10925280 11714328 12139200 12202425 12506400 13015920 13178619 13656600 14642910 15007680 15619104 16269900 17354560 17571492 18208800 18759600 19523880 21693200 21850560 21964365 23428656 24404850 25012800 26031840 26357238 27313200 29285820 31238208 32539800 35142984 36417600 36607275 37519200 39047760 43386400 43928730 46857312 48809700 52063680 52714476 54626400 58571640 65079600 65893095 70285968 73214550 75038400 78095520 86772800 87857460 93714624 97619400 105428952 109252800 109821825 117143280 130159200 131786190 140571936 146429100 156191040 175714920 195238800 210857904 219643650 234286560 260318400 263572380 281143872 292858200 329465475 351429840 390477600 421715808 439287300 468573120 527144760 585716400 658930950 702859680 780955200 843431616 878574600 1054289520 1171432800 1317861900 1405719360 1757149200 2108579040 2342865600 2635723800 3514298400 4217158080 5271447600 7028596800 10542895200 21085790400
• Sum of all divisors σ(n): 78400284144
• Sum of proper divisors (its aliquot sum) s(n): 57314493744
• 21085790400 is an abundant number, because the sum of its proper divisors (57314493744) is greater than itself. Its abundance is 36228703344

Bases of 21085790400

• Binary: 10011101000110011111010000011000000₂
• Hexadecimal: 0x4E8CFA0C0
• Base-36: 9OPXO00

Squares and roots of 21085790400

• 21085790400 squared (21085790400²) is 444610556792732160000
• 21085790400 cubed (21085790400³) is 9374965010158846569099264000000
• The square root of 21085790400 is 145209.4707655117
• The cube root of 21085790400 is 2762.6760434621

Scales and comparisons

• 21,085,790,400 seconds is equal to 670 years, 24 weeks, 12 hours.
• To count from 1 to 21,085,790,400 would take you about one thousand, three hundred forty 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 21085790400 cubic inches would be around 230.2 feet tall.

Recreational maths with 21085790400

• 21085790400 backwards is 00409758012
• 21085790400 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21085790400's digits is 36
• More coming soon!