21138601974

Names of 21138601974

• Cardinal: 21138601974 can be written as Twenty-one billion, one hundred thirty-eight million, six hundred one thousand, nine hundred seventy-four.

Scientific notation

• Scientific notation: 2.1138601974 × 10¹⁰

Factors of 21138601974

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 12137

Divisors of 21138601974

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 7 14 21 42 67 134 201 402 469 659 938 1318 1407 1977 2814 3954 4613 9226 11399 13839 22798 27678 34197 44153 68394 79793 88306 132459 159586 239379 264918 309071 478758 618142 763733 927213 1527466 1854426 2291199 4582398 5346131 7511941 10692262 15023882 16038393 22535823 32076786 45071646 52583587 105167174 157750761 315501522 503300047 1006600094 1509900141 3019800282 3523100329 7046200658 10569300987 21138601974
• Sum of all divisors σ(n): 49116672000
• Sum of proper divisors (its aliquot sum) s(n): 27978070026
• 21138601974 is an abundant number, because the sum of its proper divisors (27978070026) is greater than itself. Its abundance is 6839468052

Bases of 21138601974

• Binary: 10011101011111101010111011111110110₂
• Hexadecimal: 0x4EBF577F6
• Base-36: 9PLDLO6

Squares and roots of 21138601974

• 21138601974 squared (21138601974²) is 446840493415196696676
• 21138601974 cubed (21138601974³) is 9445583336169610893953572838424
• The square root of 21138601974 is 145391.2032208275
• The cube root of 21138601974 is 2764.9805911913

Scales and comparisons

• 21,138,601,974 seconds is equal to 672 years, 7 weeks, 2 days, 17 hours, 52 minutes, 54 seconds.
• To count from 1 to 21,138,601,974 would take you about one thousand, three hundred forty-four 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 21138601974 cubic inches would be around 230.4 feet tall.

Recreational maths with 21138601974

• 21138601974 backwards is 47910683112
• 21138601974 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21138601974's digits is 42
• More coming soon!