21355358678640

Names of 21355358678640

• Cardinal: 21355358678640 can be written as Twenty-one trillion, three hundred fifty-five billion, three hundred fifty-eight million, six hundred seventy-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.135535867864 × 10¹³

Factors of 21355358678640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 156932400

Divisors of 21355358678640

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 35 36 40 42 45 48 54 56 60 63 70 72 80 81 84 90 105 108 112 120 126 135 140 144 162 168 180 189 210 216 240 243 252 270 280 315 324 336 360 378 405 420 432 486 504 540 560 567 630 648 720 756 810 840 945 972 1008 1080 1134 1215 1260 1296 1512 1620 1680 1701 1890 1944 2160 2268 2430 2520 2835 3024 3240 3402 3780 3888 4536 4860 5040 5670 6480 6804 7560 8505 9072 9720 11340 13608 15120 17010 19440 22680 27216 34020 45360 68040 136080 156932383 313864766 470797149 627729532 784661915 941594298 1098526681 1255459064 1412391447 1569323830 1883188596 2197053362 2353985745 2510918128 2824782894 3138647660 3295580043 3766377192 4237174341 4394106724 4707971490 5492633405 5649565788 6277295320 6591160086 7061957235 7532754384 8474348682 8788213448 9415942980 9886740129 10985266810 11299131576 12554590640 12711523023 13182320172 14123914470 16477900215 16948697364 17576426896 18831885960 19773480258 21185871705 21970533620 22598263152 25423046046 26364640344 28247828940 29660220387 32955800430 33897394728 37663771920 38134569069 39546960516 42371743410 43941067240 49433700645 50846092092 52729280688 56495657880 59320440774 63557615115 65911600860 67794789456 76269138138 79093921032 84743486820 87882134480 88980661161 98867401290 101692184184 112991315760 118640881548 127115230230 131823201720 148301101935 152538276276 158187842064 169486973640 177961322322 190672845345 197734802580 203384368368 237281763096 254230460460 263646403440 266941983483 296602203870 305076552552 338973947280 355922644644 381345690690 395469605160 444903305805 474563526192 508460920920 533883966966 593204407740 610153105104 711845289288 762691381380 790939210320 889806611610 1016921841840 1067767933932 1186408815480 1334709917415 1423690578576 1525382762760 1779613223220 2135535867864 2372817630960 2669419834830 3050765525520 3559226446440 4271071735728 5338839669660 7118452892880 10677679339320 21355358678640
• Sum of all divisors σ(n): 84999601010688
• Sum of proper divisors (its aliquot sum) s(n): 63644242332048
• 21355358678640 is an abundant number, because the sum of its proper divisors (63644242332048) is greater than itself. Its abundance is 42288883653408

Bases of 21355358678640

• Binary: 100110110110000101110100100010110111001110000₂
• Hexadecimal: 0x136C2E916E70
• Base-36: 7KIIL6F00

Squares and roots of 21355358678640

• 21355358678640 squared (21355358678640²) is 456051344293364766792249600
• 21355358678640 cubed (21355358678640³) is 9739140033260745910684067169249068544000
• The square root of 21355358678640 is 4621185.8519908069
• The cube root of 21355358678640 is 27743.9923920685

Scales and comparisons

• 21,355,358,678,640 seconds is equal to 679,034 years, 18 weeks, 1 day, 5 hours, 24 minutes.
• To count from 1 to 21,355,358,678,640 would take you about one million, six hundred ninety-seven thousand, five hundred eighty-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 21355358678640 cubic inches would be around 2312 feet tall.

Recreational maths with 21355358678640

• 21355358678640 backwards is 04687685355312
• 21355358678640 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21355358678640's digits is 63
• More coming soon!