21405272832

Names of 21405272832

• Cardinal: 21405272832 can be written as Twenty-one billion, four hundred five million, two hundred seventy-two thousand, eight hundred thirty-two.

Scientific notation

• Scientific notation: 2.1405272832 × 10¹⁰

Factors of 21405272832

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 114

Divisors of 21405272832

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 17 18 24 31 32 34 36 48 51 61 62 64 68 72 93 96 102 122 124 128 136 144 153 183 186 192 204 244 248 256 272 279 288 289 306 366 372 384 408 488 496 527 544 549 558 576 578 612 732 744 768 816 867 976 992 1037 1054 1088 1098 1116 1152 1156 1224 1464 1488 1581 1632 1734 1891 1952 1984 2074 2108 2176 2196 2232 2304 2312 2448 2601 2928 2976 3111 3162 3264 3468 3782 3904 3968 4148 4216 4352 4392 4464 4624 4743 4896 4913 5202 5673 5856 5952 6222 6324 6528 6936 7564 7808 7936 8296 8432 8784 8928 8959 9248 9333 9486 9792 9826 10404 11346 11712 11904 12444 12648 13056 13872 14739 15128 15616 16592 16864 17019 17568 17629 17856 17918 18496 18666 18972 19584 19652 20808 22692 23424 23808 24888 25296 26877 27744 29478 30256 32147 33184 33728 34038 35136 35258 35712 35836 36992 37332 37944 39168 39304 41616 44217 45384 46848 49776 50592 52887 53754 55488 58956 60512 64294 66368 67456 68076 70272 70516 71424 71672 73984 74664 75888 78608 80631 83232 88434 90768 96441 99552 101184 105774 107508 110976 117912 121024 128588 132736 134912 136152 140544 141032 143344 149328 151776 152303 157216 158661 161262 166464 176868 181536 192882 199104 202368 211548 215016 221952 235824 242048 257176 265472 272304 282064 286688 289323 298656 299693 303552 304606 314432 317322 322524 332928 353736 363072 385764 398208 404736 423096 430032 456909 471648 484096 514352 544608 546499 564128 573376 578646 597312 599386 607104 609212 628864 634644 645048 665856 707472 726144 771528 796416 846192 860064 899079 913818 943296 1028704 1089216 1092998 1128256 1146752 1157292 1194624 1198772 1214208 1218424 1257728 1269288 1290096 1370727 1414944 1452288 1543056 1639497 1692384 1720128 1798158 1827636 1886592 2057408 2178432 2185996 2256512 2293504 2314584 2389248 2397544 2436848 2538576 2580192 2697237 2741454 2829888 3086112 3278994 3384768 3440256 3596316 3655272 3773184 4114816 4356864 4371992 4513024 4629168 4795088 4873696 4918491 5077152 5160384 5394474 5482908 5659776 6172224 6557988 6769536 6880512 7192632 7310544 8229632 8743984 9258336 9290483 9590176 9747392 9836982 10154304 10320768 10788948 10965816 11319552 12344448 13115976 13539072 14385264 14621088 17487968 18516672 18580966 19180352 19494784 19673964 20308608 20641536 21577896 21931632 24688896 26231952 27871449 28770528 29242176 34975936 37033344 37161932 38360704 38989568 39347928 40617216 43155792 43863264 52463904 55742898 57541056 58484352 69951872 74066688 74323864 76721408 78695856 83614347 86311584 87726528 104927808 111485796 115082112 116968704 139903744 148647728 157391712 167228694 172623168 175453056 209855616 222971592 230164224 297295456 314783424 334457388 345246336 350906112 419711232 445943184 594590912 629566848 668914776 690492672 891886368 1189181824 1259133696 1337829552 1783772736 2378363648 2675659104 3567545472 5351318208 7135090944 10702636416 21405272832
• Sum of all divisors σ(n): 68798096640
• Sum of proper divisors (its aliquot sum) s(n): 47392823808
• 21405272832 is an abundant number, because the sum of its proper divisors (47392823808) is greater than itself. Its abundance is 25987550976

Bases of 21405272832

• Binary: 10011111011110110101000101100000000₂
• Hexadecimal: 0x4FBDA8B00
• Base-36: 9U05A80

Squares and roots of 21405272832

• 21405272832 squared (21405272832²) is 458185705012357300224
• 21405272832 cubed (21405272832³) is 9807590023511777942761654714368
• The square root of 21405272832 is 146305.4094420297
• The cube root of 21405272832 is 2776.5591036125

Scales and comparisons

• 21,405,272,832 seconds is equal to 680 years, 32 weeks, 2 days, 5 hours, 7 minutes, 12 seconds.
• To count from 1 to 21,405,272,832 would take you about one thousand, three hundred sixty-one 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 21405272832 cubic inches would be around 231.4 feet tall.

Recreational maths with 21405272832

• 21405272832 backwards is 23827250412
• 21405272832 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21405272832's digits is 36
• More coming soon!