21474664728

Names of 21474664728

• Cardinal: 21474664728 can be written as Twenty-one billion, four hundred seventy-four million, six hundred sixty-four thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1474664728 × 10¹⁰

Factors of 21474664728

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 296

Divisors of 21474664728

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 8 11 12 19 22 24 33 37 38 44 57 66 67 74 76 88 111 114 121 132 134 148 152 157 201 209 222 228 242 264 268 296 314 363 402 407 418 444 456 471 484 536 627 628 703 726 737 804 814 836 888 942 968 1221 1254 1256 1273 1406 1452 1474 1608 1628 1672 1727 1884 2109 2211 2299 2442 2479 2508 2546 2812 2904 2948 2983 3256 3454 3768 3819 4218 4422 4477 4598 4884 4958 5016 5092 5181 5624 5809 5896 5966 6897 6908 7437 7638 7733 8107 8436 8844 8949 8954 9196 9768 9916 10184 10362 10519 11618 11932 13431 13794 13816 14003 14874 15276 15466 16214 16872 17427 17688 17898 17908 18392 18997 19832 20724 21038 23199 23236 23864 24321 26862 27269 27588 28006 29748 30552 30932 31557 32428 32813 34854 35796 35816 37994 41448 42009 42076 46398 46472 47101 48642 53724 54538 55176 56012 56991 59496 61864 63114 63899 64856 65626 69708 71592 75988 81807 84018 84152 85063 92796 94202 97284 98439 107448 109076 110371 112024 113982 115709 126228 127798 131252 139416 141303 151976 154033 163614 168036 170126 185592 188404 191697 194568 196878 199861 218152 220742 227964 231418 252456 255189 255596 262504 282606 299959 308066 327228 331113 336072 340252 347127 360943 376808 383394 389203 393756 399722 441484 455928 462099 462836 510378 511192 518111 565212 599583 599918 616132 654456 662226 680504 694254 702889 721886 766788 778406 787512 799444 882968 899877 924198 925672 1020756 1036222 1082829 1130424 1167609 1199166 1199836 1214081 1232264 1272799 1324452 1388508 1405778 1443772 1533576 1554333 1556812 1598888 1799754 1848396 2041512 2072444 2108667 2165658 2198471 2335218 2398332 2399672 2428162 2545598 2648904 2777016 2811556 2887544 3108666 3113624 3599508 3642243 3696792 3818397 4144888 4217334 4281233 4331316 4396942 4670436 4796664 4856324 5091196 5623112 5699221 6217332 6595413 7199016 7284486 7394857 7636794 8434668 8562466 8662632 8793884 9340872 9712648 10182392 11398442 12434664 12843699 13190826 13354891 14568972 14789714 15273588 16869336 17097663 17124932 17587768 22184571 22796884 24183181 25687398 26381652 26709782 29137944 29579428 30547176 34195326 34249864 40064673 44369142 45593768 47093563 48366362 51374796 52763304 53419564 59158856 68390652 72549543 80129346 81343427 88738284 94187126 96732724 102749592 106839128 136781304 141280689 145099086 160258692 162686854 177476568 188374252 193465448 244030281 282561378 290198172 320517384 325373708 376748504 488060562 565122756 580396344 650747416 894777697 976121124 1130245512 1789555394 1952242248 2684333091 3579110788 5368666182 7158221576 10737332364 21474664728
• Sum of all divisors σ(n): 65160211200
• Sum of proper divisors (its aliquot sum) s(n): 43685546472
• 21474664728 is an abundant number, because the sum of its proper divisors (43685546472) is greater than itself. Its abundance is 22210881744

Bases of 21474664728

• Binary: 10011111111111111010110000100011000₂
• Hexadecimal: 0x4FFFD6118
• Base-36: 9V5GLCO

Squares and roots of 21474664728

• 21474664728 squared (21474664728²) is 461161225180007313984
• 21474664728 cubed (21474664728³) is 9903282696294368516394225956352
• The square root of 21474664728 is 146542.3649597619
• The cube root of 21474664728 is 2779.5562292183

Scales and comparisons

• 21,474,664,728 seconds is equal to 682 years, 43 weeks, 8 hours, 38 minutes, 48 seconds.
• To count from 1 to 21,474,664,728 would take you about one thousand, three hundred sixty-five 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 21474664728 cubic inches would be around 231.6 feet tall.

Recreational maths with 21474664728

• 21474664728 backwards is 82746647412
• The number of decimal digits it has is: 11
• The sum of 21474664728's digits is 51
• More coming soon!