21381778476138720

Names of 21381778476138720

• Cardinal: 21381778476138720 can be written as Twenty-one quadrillion, three hundred eighty-one trillion, seven hundred seventy-eight billion, four hundred seventy-six million, one hundred thirty-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.138177847613872 × 10¹⁶

Factors of 21381778476138720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 145098931344

Divisors of 21381778476138720

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 80 96 120 160 240 307 480 614 921 1228 1535 1842 2456 3070 3684 4605 4912 6140 7368 9210 9824 12280 14736 18420 24560 29472 36840 49120 73680 147360 145098931027 290197862054 435296793081 580395724108 725494655135 870593586162 1160791448216 1450989310270 1741187172324 2176483965405 2321582896432 2901978620540 3482374344648 4352967930810 4643165792864 5803957241080 6964748689296 8705935861620 11607914482160 13929497378592 17411871723240 23215828964320 34823743446480 44545371825289 69647486892960 89090743650578 133636115475867 178181487301156 222726859126445 267272230951734 356362974602312 445453718252890 534544461903468 668180577379335 712725949204624 890907436505780 1069088923806936 1336361154758670 1425451898409248 1781814873011560 2138177847613872 2672722309517340 3563629746023120 4276355695227744 5345444619034680 7127259492046240 10690889238069360 21381778476138720
• Sum of all divisors σ(n): 67571991784015488
• Sum of proper divisors (its aliquot sum) s(n): 46190213307876768
• 21381778476138720 is an abundant number, because the sum of its proper divisors (46190213307876768) is greater than itself. Its abundance is 24808434831738048

Bases of 21381778476138720

• Binary: 1001011111101101001110100111110101111001000000011100000₂
• Hexadecimal: 0x4BF69D3EBC80E0
• Base-36: 5UJ7HFFJ65C

Squares and roots of 21381778476138720

• 21381778476138720 squared (21381778476138720²) is 457180450802669043196400683238400
• 21381778476138720 cubed (21381778476138720³) is 9775331122683905943303660619210719799457230848000
• The square root of 21381778476138720 is 146225095.2338165517
• The cube root of 21381778476138720 is 277554.2884393837

Scales and comparisons

• 21,381,778,476,138,720 seconds is equal to 679,874,417 years, 18 weeks, 4 days, 6 hours, 32 minutes.
• To count from 1 to 21,381,778,476,138,720 would take you about two billion, thirty-nine million, six hundred twenty-three thousand, two hundred fifty-two 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 21381778476138720 cubic inches would be around 23129.5 feet tall.

Recreational maths with 21381778476138720

• 21381778476138720 backwards is 02783167487718312
• The number of decimal digits it has is: 17
• The sum of 21381778476138720's digits is 75
• More coming soon!