21290515389

Names of 21290515389

• Cardinal: 21290515389 can be written as Twenty-one billion, two hundred ninety million, five hundred fifteen thousand, three hundred eighty-nine.

Scientific notation

• Scientific notation: 2.1290515389 × 10¹⁰

Factors of 21290515389

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4619

Divisors of 21290515389

• Number of divisors d(n): 120
• Complete list of divisors:
  1 3 9 11 13 27 31 33 39 81 93 99 117 143 169 279 297 341 351 403 429 507 837 891 1023 1053 1209 1287 1521 1859 2511 3069 3627 3861 4433 4561 4563 5239 5577 9207 10881 11583 13299 13683 13689 15717 16731 27621 32643 39897 41049 47151 50171 50193 57629 59293 119691 123147 141391 141453 150513 150579 172887 177879 359073 369441 424173 424359 451539 518661 533637 652223 770809 1272519 1354617 1555301 1555983 1600911 1838083 1956669 2312427 3817557 4063851 4665903 4667949 4802733 5514249 5870007 6937281 8478899 11452671 13997709 16542747 17610021 20218913 20811843 23895079 25436697 41993127 49628241 52830063 60656739 62435529 71685237 76310091 125979381 148884723 181970217 215055711 228930273 262845869 545910651 645167133 686790819 788537607 1637731953 1935501399 2365612821 7096838463 21290515389
• Sum of all divisors σ(n): 38790284544
• Sum of proper divisors (its aliquot sum) s(n): 17499769155
• 21290515389 is a deficient number, because the sum of its proper divisors (17499769155) is less than itself. Its deficiency is 3790746234

Bases of 21290515389

• Binary: 10011110101000000110111101110111101₂
• Hexadecimal: 0x4F5037BBD
• Base-36: 9S3TMT9

Squares and roots of 21290515389

• 21290515389 squared (21290515389²) is 453286045529245821321
• 21290515389 cubed (21290515389³) is 9650693527959362808398694808869
• The square root of 21290515389 is 145912.6978333277
• The cube root of 21290515389 is 2771.5883355899

Scales and comparisons

• 21,290,515,389 seconds is equal to 676 years, 50 weeks, 4 days, 3 minutes, 9 seconds.
• To count from 1 to 21,290,515,389 would take you about one thousand, three hundred fifty-three 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 21290515389 cubic inches would be around 231 feet tall.

Recreational maths with 21290515389

• 21290515389 backwards is 98351509212
• The number of decimal digits it has is: 11
• The sum of 21290515389's digits is 45
• More coming soon!