18121790628

Names of 18121790628

• Cardinal: 18121790628 can be written as Eighteen billion, one hundred twenty-one million, seven hundred ninety thousand, six hundred twenty-eight.

Scientific notation

• Scientific notation: 1.8121790628 × 10¹⁰

Factors of 18121790628

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 445

Divisors of 18121790628

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 6 9 12 17 18 29 34 36 51 58 68 87 102 116 137 153 174 204 257 261 274 306 348 411 493 514 522 548 612 771 822 841 986 1028 1044 1233 1479 1542 1644 1682 1972 2313 2329 2466 2523 2958 3084 3364 3973 4369 4437 4626 4658 4932 5046 5916 6987 7453 7569 7946 8738 8874 9252 9316 10092 11919 13107 13974 14297 14906 15138 15892 17476 17748 20961 22359 23838 26214 27948 28594 29812 30276 35209 35757 39321 41922 42891 44718 47676 52428 57188 67077 67541 70418 71514 78642 83844 85782 89436 105627 115217 126701 128673 134154 135082 140836 143028 157284 171564 202623 211254 216137 230434 253402 257346 268308 270164 316881 345651 380103 405246 422508 432274 460868 506804 514692 598553 607869 633762 648411 691302 760206 810492 864548 1021061 1036953 1140309 1197106 1215738 1267524 1296822 1382604 1520412 1795659 1945233 1958689 2042122 2073906 2280618 2394212 2431476 2593644 3063183 3591318 3674329 3890466 3917378 4084244 4147812 4561236 5386977 5876067 6126366 7182636 7348658 7780932 7834756 9189549 10773954 11022987 11752134 12252732 14697316 17358037 17628201 18379098 21547908 22045974 23504268 29610769 33068961 34716074 35256402 36758196 44091948 52074111 59221538 66137922 69432148 70512804 88832307 104148222 118443076 132275844 156222333 177664614 208296444 266496921 312444666 355329228 503383073 532993842 624889332 1006766146 1065987684 1510149219 2013532292 3020298438 4530447657 6040596876 9060895314 18121790628
• Sum of all divisors σ(n): 50796155592
• Sum of proper divisors (its aliquot sum) s(n): 32674364964
• 18121790628 is an abundant number, because the sum of its proper divisors (32674364964) is greater than itself. Its abundance is 14552574336

Bases of 18121790628

• Binary: 10000111000001001001001010010100100₂
• Hexadecimal: 0x4382494A4
• Base-36: 8BP8V50

Squares and roots of 18121790628

• 18121790628 squared (18121790628²) is 328399295565068634384
• 18121790628 cubed (18121790628³) is 5951183276612862742756729753152
• The square root of 18121790628 is 134617.2003423039
• The cube root of 18121790628 is 2626.6388860111

Scales and comparisons

• 18,121,790,628 seconds is equal to 576 years, 11 weeks, 1 day, 22 hours, 43 minutes, 48 seconds.
• To count from 1 to 18,121,790,628 would take you about one 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 18121790628 cubic inches would be around 218.9 feet tall.

Recreational maths with 18121790628

• 18121790628 backwards is 82609712181
• The number of decimal digits it has is: 11
• The sum of 18121790628's digits is 45
• More coming soon!