21287009807442

Names of 21287009807442

• Cardinal: 21287009807442 can be written as Twenty-one trillion, two hundred eighty-seven billion, nine million, eight hundred seven thousand, four hundred forty-two.

Scientific notation

• Scientific notation: 2.1287009807442 × 10¹³

Factors of 21287009807442

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 615

Divisors of 21287009807442

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 6 9 18 27 47 54 94 141 282 423 563 846 1126 1269 1689 2209 2538 3378 4418 5067 6627 10134 13254 15201 19881 26461 30402 39762 52922 59643 79383 119286 158766 238149 316969 476298 633938 714447 950907 1243667 1428894 1901814 2487334 2852721 3731001 5705442 7462002 8558163 11193003 14897543 17116326 22386006 29795086 33579009 44692629 67158018 89385258 134077887 178453547 268155774 356907094 402233661 535360641 700184521 804467322 1070721282 1400369042 1606081923 2100553563 3212163846 4201107126 4818245769 6301660689 8387316709 9636491538 12603321378 16774633418 18904982067 25161950127 37809964134 50323900254 75485850381 150971700762 226457551143 394203885323 452915102286 788407770646 1182611655969 2365223311938 3547834967907 7095669935814 10643504903721 21287009807442
• Sum of all divisors σ(n): 48418359307200
• Sum of proper divisors (its aliquot sum) s(n): 27131349499758
• 21287009807442 is an abundant number, because the sum of its proper divisors (27131349499758) is greater than itself. Its abundance is 5844339692316

Bases of 21287009807442

• Binary: 100110101110001000100101010000110110001010010₂
• Hexadecimal: 0x135C44A86C52
• Base-36: 7JN480WGI

Squares and roots of 21287009807442

• 21287009807442 squared (21287009807442²) is 453136786542131893918583364
• 21287009807442 cubed (21287009807442³) is 9645927219235113704183990026127064594888
• The square root of 21287009807442 is 4613784.7595484989
• The cube root of 21287009807442 is 27714.3620897245

Scales and comparisons

• 21,287,009,807,442 seconds is equal to 676,861 years, 3 weeks, 3 days, 7 hours, 50 minutes, 42 seconds.
• To count from 1 to 21,287,009,807,442 would take you about one million, six hundred ninety-two thousand, one 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 21287009807442 cubic inches would be around 2309.5 feet tall.

Recreational maths with 21287009807442

• 21287009807442 backwards is 24470890078212
• 21287009807442 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21287009807442's digits is 54
• More coming soon!