21205818088

Names of 21205818088

• Cardinal: 21205818088 can be written as Twenty-one billion, two hundred five million, eight hundred eighteen thousand and eighty-eight.

Scientific notation

• Scientific notation: 2.1205818088 × 10¹⁰

Factors of 21205818088

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1853

Divisors of 21205818088

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 7 8 13 14 17 26 28 31 34 52 56 62 68 91 104 119 124 136 182 217 221 238 248 364 403 434 442 476 527 728 806 868 884 952 961 1054 1547 1612 1736 1768 1783 1922 2108 2821 3094 3224 3566 3689 3844 4216 5642 6188 6727 6851 7132 7378 7688 11284 12376 12481 12493 13454 13702 14264 14756 16337 22568 23179 24962 24986 26908 27404 29512 30311 32674 46358 47957 49924 49972 53816 54808 55273 60622 65348 87451 92716 95914 99848 99944 110546 114359 121244 130696 162253 174902 185432 191828 212177 212381 221092 228718 242488 324506 349804 383656 386911 394043 424354 424762 442184 457436 649012 699608 718549 773822 788086 848708 849524 914872 939641 1298024 1437098 1486667 1547644 1576172 1697416 1699048 1713463 1879282 2758301 2874196 2973334 3095288 3152344 3426926 3758564 5029843 5516602 5748392 5946668 6577487 6853852 7517128 10059686 11033204 11893336 11994241 12215333 13154974 13707704 20119372 22066408 22275019 23988482 24430666 26309948 29128871 40238744 44550038 47976964 48861332 52619896 58257742 85507331 89100076 95953928 97722664 116515484 155925133 171014662 178200152 203902097 233030968 311850266 342029324 378675323 407804194 623700532 684058648 757350646 815608388 1247401064 1514701292 1631216776 2650727261 3029402584 5301454522 10602909044 21205818088
• Sum of all divisors σ(n): 53570522880
• Sum of proper divisors (its aliquot sum) s(n): 32364704792
• 21205818088 is an abundant number, because the sum of its proper divisors (32364704792) is greater than itself. Its abundance is 11158886704

Bases of 21205818088

• Binary: 10011101111111101110001101011101000₂
• Hexadecimal: 0x4EFF71AE8
• Base-36: 9QPE9YG

Squares and roots of 21205818088

• 21205818088 squared (21205818088²) is 449686720781347975744
• 21205818088 cubed (21205818088³) is 9535974797478514397054300457472
• The square root of 21205818088 is 145622.1758112411
• The cube root of 21205818088 is 2767.9081674707

Scales and comparisons

• 21,205,818,088 seconds is equal to 674 years, 14 weeks, 3 days, 17 hours, 1 minute, 28 seconds.
• To count from 1 to 21,205,818,088 would take you about one thousand, three hundred forty-eight 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 21205818088 cubic inches would be around 230.7 feet tall.

Recreational maths with 21205818088

• 21205818088 backwards is 88081850212
• The number of decimal digits it has is: 11
• The sum of 21205818088's digits is 43
• More coming soon!