21231699390

Names of 21231699390

• Cardinal: 21231699390 can be written as Twenty-one billion, two hundred thirty-one million, six hundred ninety-nine thousand, three hundred ninety.

Scientific notation

• Scientific notation: 2.123169939 × 10¹⁰

Factors of 21231699390

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 442

Divisors of 21231699390

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 5 6 9 10 11 15 18 22 30 33 45 55 66 90 99 110 121 165 198 242 330 363 421 495 605 726 842 990 1089 1210 1263 1331 1815 2105 2178 2526 2662 3630 3789 3993 4210 4631 5445 6315 6655 7578 7986 9262 10890 11979 12630 13310 13893 18945 19965 23155 23958 27786 37890 39930 41679 46310 50941 59895 69465 83358 101882 119790 138930 152823 177241 208395 254705 305646 354482 416790 458469 509410 531723 560351 764115 886205 916938 1063446 1120702 1528230 1595169 1681053 1772410 1949651 2292345 2658615 2801755 3190338 3362106 3899302 4584690 5043159 5317230 5603510 5848953 7975845 8405265 9748255 10086318 11697906 15951690 16810530 17546859 19496510 21446161 25215795 29244765 35093718 42892322 50431590 58489530 64338483 87734295 107230805 128676966 175468590 193015449 214461610 235907771 321692415 386030898 471815542 643384830 707723313 965077245 1179538855 1415446626 1930154490 2123169939 2359077710 3538616565 4246339878 7077233130 10615849695 21231699390
• Sum of all divisors σ(n): 60863079888
• Sum of proper divisors (its aliquot sum) s(n): 39631380498
• 21231699390 is an abundant number, because the sum of its proper divisors (39631380498) is greater than itself. Its abundance is 18399681108

Bases of 21231699390

• Binary: 10011110001100000100000010110111110₂
• Hexadecimal: 0x4F18205BE
• Base-36: 9R4T03I

Squares and roots of 21231699390

• 21231699390 squared (21231699390²) is 450785058987326372100
• 21231699390 cubed (21231699390³) is 9570932861922331352246483019000
• The square root of 21231699390 is 145711.0132762795
• The cube root of 21231699390 is 2769.0337696167

Scales and comparisons

• 21,231,699,390 seconds is equal to 675 years, 5 weeks, 2 days, 6 hours, 16 minutes, 30 seconds.
• To count from 1 to 21,231,699,390 would take you about one thousand, three hundred fifty 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 21231699390 cubic inches would be around 230.8 feet tall.

Recreational maths with 21231699390

• 21231699390 backwards is 09399613212
• 21231699390 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21231699390's digits is 45
• More coming soon!