21005987993446640

Names of 21005987993446640

• Cardinal: 21005987993446640 can be written as Twenty-one quadrillion, five trillion, nine hundred eighty-seven billion, nine hundred ninety-three million, four hundred forty-six thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.100598799344664 × 10¹⁶

Factors of 21005987993446640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 26418065

Divisors of 21005987993446640

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 4 5 8 10 16 19 20 38 40 76 80 95 152 190 304 380 541 760 967 1082 1520 1934 2164 2705 3868 4328 4835 5410 7736 8656 9670 10279 10820 15472 18373 19340 20558 21640 36746 38680 41116 43280 51395 73492 77360 82232 91865 102790 146984 164464 183730 205580 293968 367460 411160 523147 734920 822320 1046294 1469840 2092588 2615735 4185176 5231470 8370352 9939793 10462940 19879586 20925880 26416531 39759172 41851760 49698965 52833062 79518344 99397930 105666124 132082655 159036688 198795860 211332248 264165310 397591720 422664496 501914089 528330620 795183440 1003828178 1056661240 2007656356 2113322480 2509570445 4015312712 5019140890 8030625424 10038281780 14291343271 20076563560 25544785477 28582686542 40153127120 51089570954 57165373084 71456716355 102179141908 114330746168 127723927385 142913432710 204358283816 228661492336 255447854770 271535522149 285826865420 408716567632 485350924063 510895709540 543071044298 571653730840 970701848126 1021791419080 1086142088596 1143307461680 1357677610745 1941403696252 2043582838160 2172284177192 2426754620315 2715355221490 3882807392504 4344568354384 4853509240630 5430710442980 7765614785008 9707018481260 10861420885960 13819728943057 19414036962520 21722841771920 27639457886114 38828073925040 55278915772228 69098644715285 110557831544456 138197289430570 221115663088912 262574849918083 276394578861140 525149699836166 552789157722280 1050299399672332 1105578315444560 1312874249590415 2100598799344664 2625748499180830 4201197598689328 5251496998361660 10502993996723320 21005987993446640
• Sum of all divisors σ(n): 51557682288330240
• Sum of proper divisors (its aliquot sum) s(n): 30551694294883600
• 21005987993446640 is an abundant number, because the sum of its proper divisors (30551694294883600) is greater than itself. Its abundance is 9545706301436960

Bases of 21005987993446640

• Binary: 1001010101000001101010110110100100000010110100011110000₂
• Hexadecimal: 0x4AA0D5B48168F0
• Base-36: 5QU01NWRDGW

Squares and roots of 21005987993446640

• 21005987993446640 squared (21005987993446640²) is 441251531580824397003586527289600
• 21005987993446640 cubed (21005987993446640³) is 9268924374476738176564063178859586320321426944000
• The square root of 21005987993446640 is 144934426.5295400409
• The cube root of 21005987993446640 is 275918.6380347975

Scales and comparisons

• 21,005,987,993,446,640 seconds is equal to 667,925,442 years, 21 weeks, 6 hours, 17 minutes, 20 seconds.
• To count from 1 to 21,005,987,993,446,640 would take you about two billion, three million, seven hundred seventy-six thousand, three hundred twenty-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 21005987993446640 cubic inches would be around 22993.2 feet tall.

Recreational maths with 21005987993446640

• 21005987993446640 backwards is 04664439978950012
• The number of decimal digits it has is: 17
• The sum of 21005987993446640's digits is 77
• More coming soon!