21355921664

Names of 21355921664

• Cardinal: 21355921664 can be written as Twenty-one billion, three hundred fifty-five million, nine hundred twenty-one thousand, six hundred sixty-four.

Scientific notation

• Scientific notation: 2.1355921664 × 10¹⁰

Factors of 21355921664

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 193

Divisors of 21355921664

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 4 7 8 11 14 16 22 28 32 37 44 47 49 56 64 74 77 88 89 94 98 112 128 148 154 176 178 188 196 224 256 259 296 308 329 352 356 376 392 407 448 517 518 539 592 616 623 658 704 712 752 784 814 896 979 1034 1036 1078 1184 1232 1246 1316 1408 1424 1504 1568 1628 1739 1792 1813 1958 2068 2072 2156 2303 2368 2464 2492 2632 2816 2848 2849 3008 3136 3256 3293 3478 3619 3626 3916 4136 4144 4183 4312 4361 4606 4736 4928 4984 5264 5696 5698 6016 6272 6512 6586 6853 6956 7238 7252 7832 8272 8288 8366 8624 8722 9212 9472 9856 9968 10528 11392 11396 12032 12173 12544 13024 13172 13706 13912 14476 14504 15664 16544 16576 16732 17248 17444 18424 19129 19712 19936 19943 21056 22784 22792 23051 24346 25333 26048 26344 27412 27824 28952 29008 29281 31328 33088 33152 33464 34496 34888 36223 36848 38258 39872 39886 42112 45584 46013 46102 47971 48692 50666 52096 52688 54824 55648 57904 58016 58562 62656 66176 66304 66928 68992 69776 72446 73696 76516 79744 79772 84224 85211 91168 92026 92204 95942 97384 101332 104192 105376 109648 111296 115808 116032 117124 125312 132352 133856 133903 137984 139552 144892 147392 153032 154771 159488 159544 161357 170422 182336 184052 184408 191884 194768 202664 204967 210752 219296 222592 231616 232064 234248 250624 253561 267712 267806 279104 289784 294784 306064 309542 319088 322091 322714 340844 364672 368104 368816 383768 389536 405328 409934 421504 438592 445184 463232 464128 468496 507122 535424 535612 558208 579568 589568 612128 619084 638176 644182 645428 681688 729344 736208 737632 767536 779072 810656 819868 843008 877184 926464 936992 937321 1014244 1070848 1071224 1083397 1116416 1159136 1224256 1238168 1276352 1288364 1290856 1363376 1472416 1475264 1535072 1558144 1621312 1639736 1702481 1754368 1774927 1873984 1874642 2028488 2142448 2166794 2254637 2318272 2448512 2476336 2552704 2576728 2581712 2726752 2944832 2950528 3070144 3116288 3242624 3279472 3404962 3549854 3747968 3749284 4056976 4284896 4333588 4509274 4636544 4897024 4952672 5105408 5153456 5163424 5453504 5889664 5901056 6140288 6485248 6558944 6809924 7099708 7495936 7498568 7583779 8113952 8569792 8667176 9018548 9273088 9905344 10306912 10326848 10907008 11779328 11917367 12280576 13117888 13619848 14199416 14997136 15167558 16227904 17139584 17334352 18037096 19810688 20613824 20653696 21814016 23834734 26235776 27239696 28398832 29994272 30335116 32455808 34279168 34668704 36074192 39621376 41227648 41307392 47669468 52471552 54479392 56797664 59988544 60670232 64911616 69337408 72148384 82455296 83421569 95338936 108958784 113595328 119977088 121340464 138674816 144296768 166843138 190677872 217917568 227190656 239954176 242680928 277349632 288593536 333686276 381355744 435835136 454381312 485361856 577187072 667372552 762711488 970723712 1334745104 1525422976 1941447424 2669490208 3050845952 5338980416 10677960832 21355921664
• Sum of all divisors σ(n): 57377859840
• Sum of proper divisors (its aliquot sum) s(n): 36021938176
• 21355921664 is an abundant number, because the sum of its proper divisors (36021938176) is greater than itself. Its abundance is 14666016512

Bases of 21355921664

• Binary: 10011111000111010011000000100000000₂
• Hexadecimal: 0x4F8E98100
• Base-36: 9T6RIM8

Squares and roots of 21355921664

• 21355921664 squared (21355921664²) is 456075390118904528896
• 21355921664 cubed (21355921664³) is 9739910304257564764597800402944
• The square root of 21355921664 is 146136.6540741917
• The cube root of 21355921664 is 2774.4236192301

Scales and comparisons

• 21,355,921,664 seconds is equal to 679 years, 2 weeks, 5 days, 27 minutes, 44 seconds.
• To count from 1 to 21,355,921,664 would take you about one thousand, three hundred fifty-eight 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 21355921664 cubic inches would be around 231.2 feet tall.

Recreational maths with 21355921664

• 21355921664 backwards is 46612955312
• 21355921664 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21355921664's digits is 44
• More coming soon!