21287184481728

Names of 21287184481728

• Cardinal: 21287184481728 can be written as Twenty-one trillion, two hundred eighty-seven billion, one hundred eighty-four million, four hundred eighty-one thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1287184481728 × 10¹³

Factors of 21287184481728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 2377894

Divisors of 21287184481728

• Number of divisors d(n): 280
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 27 32 33 36 44 48 54 64 66 72 81 88 96 99 108 132 144 157 162 176 192 198 216 264 288 297 314 324 352 396 432 471 528 576 594 628 648 704 792 864 891 942 1056 1188 1256 1296 1413 1584 1727 1728 1782 1884 2112 2376 2512 2592 2826 3168 3454 3564 3768 4239 4752 5024 5181 5184 5652 6336 6908 7128 7536 8478 9504 10048 10362 11304 12717 13816 14256 15072 15543 16956 19008 20724 22608 25434 27632 28512 30144 31086 33912 41448 45216 46629 50868 55264 57024 62172 67824 82896 90432 93258 101736 110528 124344 135648 139887 165792 186516 203472 248688 271296 279774 331584 373032 406944 497376 559548 746064 813888 994752 1119096 1492128 2238192 2377721 2984256 4476384 4755442 7133163 8952768 9510884 14266326 19021768 21399489 26154931 28532652 38043536 42798978 52309862 57065304 64198467 76087072 78464793 85597956 104619724 114130608 128396934 152174144 156929586 171195912 192595401 209239448 228261216 235394379 256793868 313859172 342391824 373302197 385190802 418478896 456522432 470788758 513587736 627718344 684783648 706183137 746604394 770381604 836957792 941577516 1027175472 1119906591 1255436688 1369567296 1412366274 1493208788 1540763208 1673915584 1883155032 2054350944 2118549411 2239813182 2510873376 2824732548 2986417576 3081526416 3359719773 3766310064 4106324167 4108701888 4237098822 4479626364 5021746752 5649465096 5972835152 6163052832 6719439546 7532620128 8212648334 8474197644 8959252728 10079159319 11298930192 11945670304 12318972501 12326105664 13438879092 15065240256 16425296668 16948395288 17918505456 20158318638 22597860384 23891340608 24637945002 26877758184 30237477957 32850593336 33896790576 35837010912 36956917503 40316637276 45195720768 49275890004 53755516368 60474955914 65701186672 67793581152 71674021824 73913835006 80633274552 98551780008 107511032736 110870752509 120949911828 131402373344 135587162304 147827670012 161266549104 197103560016 215022065472 221741505018 241899823656 262804746688 295655340024 322533098208 332612257527 394207120032 443483010036 483799647312 591310680048 645066196416 665224515054 788414240064 886966020072 967599294624 1182621360096 1330449030108 1773932040144 1935198589248 2365242720192 2660898060216 3547864080288 5321796120432 7095728160576 10643592240864 21287184481728
• Sum of all divisors σ(n): 69276908734704
• Sum of proper divisors (its aliquot sum) s(n): 47989724252976
• 21287184481728 is an abundant number, because the sum of its proper divisors (47989724252976) is greater than itself. Its abundance is 26702539771248

Bases of 21287184481728

• Binary: 100110101110001001111000100011011110111000000₂
• Hexadecimal: 0x135C4F11BDC0
• Base-36: 7JN740S00

Squares and roots of 21287184481728

• 21287184481728 squared (21287184481728²) is 453144223159121379965865984
• 21287184481728 cubed (21287184481728³) is 9646164675217538427664527048945744740352
• The square root of 21287184481728 is 4613803.6891189899
• The cube root of 21287184481728 is 27714.4378945339

Scales and comparisons

• 21,287,184,481,728 seconds is equal to 676,866 years, 32 weeks, 2 days, 28 minutes, 48 seconds.
• To count from 1 to 21,287,184,481,728 would take you about one million, six hundred ninety-two thousand, one hundred sixty-six 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 21287184481728 cubic inches would be around 2309.5 feet tall.

Recreational maths with 21287184481728

• 21287184481728 backwards is 82718448178212
• The number of decimal digits it has is: 14
• The sum of 21287184481728's digits is 63
• More coming soon!