21505208397946

Names of 21505208397946

• Cardinal: 21505208397946 can be written as Twenty-one trillion, five hundred five billion, two hundred eight million, three hundred ninety-seven thousand, nine hundred forty-six.

Scientific notation

• Scientific notation: 2.1505208397946 × 10¹³

Factors of 21505208397946

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 303

Divisors of 21505208397946

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 7 13 14 26 29 58 71 91 142 169 181 182 203 338 362 377 406 497 754 841 923 994 1183 1267 1682 1846 2059 2353 2366 2534 2639 4118 4706 4901 5249 5278 5887 6461 9802 10498 10933 11774 11999 12851 12922 14413 16471 21866 23998 24389 25702 26767 28826 30589 32942 34307 36743 48778 53534 59711 61178 68237 68614 73486 76531 83993 89957 119422 136474 142129 152221 153062 167063 167986 170723 179914 187369 214123 284258 304442 317057 334126 341446 347971 372679 374738 417977 428246 477659 634114 695942 707281 745358 776243 835954 887081 955318 994903 1065547 1169441 1414562 1552486 1731619 1774162 1978873 1989806 2131094 2171819 2219399 2338882 2435797 2608753 3463238 3957746 4121741 4343638 4414409 4438798 4844827 4871594 4950967 5217506 5433701 6209567 8243482 8828818 9194653 9689654 9901934 10091159 10807691 10867402 12121333 12419134 13852111 15202733 18389306 20182318 21615382 22511047 24242666 25725349 27704222 28852187 30405466 30900863 33913789 45022094 50216951 51450698 57387317 57704374 61801726 62982751 64362571 67827578 70638113 75653837 100433902 114774634 119530489 125965502 128017861 128725142 140499983 141276226 151307674 157577329 180077443 239060978 256035722 280999966 292643611 313423039 315154658 351518657 360154886 401711219 440879257 585287222 626846078 652820363 703037314 746035121 803422438 836713423 881758514 896125027 983499881 1305640726 1492070242 1664232193 1673426846 1792250054 1826499779 1966999762 2048505277 2193961273 3328464386 3652999558 4074499507 4097010554 4387922546 4569742541 5222245847 8148999014 8486664719 9089268131 9139485082 10444491694 11649625351 12785498453 16973329438 18178536262 21635018509 23299250702 25570996906 28521496549 43270037018 52968493591 57042993098 59406653033 63624876917 105936987182 118160485703 118813306066 127249753834 151445129563 236320971406 302890259126 370779455137 741558910274 827123399921 1536086314139 1654246799842 3072172628278 10752604198973 21505208397946
• Sum of all divisors σ(n): 42159762223488
• Sum of proper divisors (its aliquot sum) s(n): 20654553825542
• 21505208397946 is a deficient number, because the sum of its proper divisors (20654553825542) is less than itself. Its deficiency is 850654572404

Bases of 21505208397946

• Binary: 100111000111100010010010011101011000001111010₂
• Hexadecimal: 0x138F124EB07A
• Base-36: 7MFCTTYEY

Squares and roots of 21505208397946

• 21505208397946 squared (21505208397946²) is 462473988239087163897018916
• 21505208397946 cubed (21505208397946³) is 9945599495710796913527262892677617546536
• The square root of 21505208397946 is 4637370.8497322055
• The cube root of 21505208397946 is 27808.7340351805

Scales and comparisons

• 21,505,208,397,946 seconds is equal to 683,799 years, 5 weeks, 3 days, 23 hours, 25 minutes, 46 seconds.
• To count from 1 to 21,505,208,397,946 would take you about one million, seven hundred nine thousand, four hundred ninety-seven 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 21505208397946 cubic inches would be around 2317.4 feet tall.

Recreational maths with 21505208397946

• 21505208397946 backwards is 64979380250512
• The number of decimal digits it has is: 14
• The sum of 21505208397946's digits is 61
• More coming soon!