21358680390

Names of 21358680390

• Cardinal: 21358680390 can be written as Twenty-one billion, three hundred fifty-eight million, six hundred eighty thousand, three hundred ninety.

Scientific notation

• Scientific notation: 2.135868039 × 10¹⁰

Factors of 21358680390

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 7499

Divisors of 21358680390

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 30 31 45 62 90 93 155 186 279 310 465 558 930 1229 1395 2458 2790 3687 6145 6229 7374 11061 12290 12458 18435 18687 22122 31145 36870 37374 38099 55305 56061 62290 76198 93435 110610 112122 114297 186870 190495 193099 228594 280305 342891 380990 386198 560610 571485 579297 685782 965495 1142970 1158594 1714455 1737891 1930990 2896485 3428910 3475782 5792970 7655441 8689455 15310882 17378910 22966323 38277205 45932646 68898969 76554410 114831615 137797938 229663230 237318671 344494845 474637342 688989690 711956013 1186593355 1423912026 2135868039 2373186710 3559780065 4271736078 7119560130 10679340195 21358680390
• Sum of all divisors σ(n): 57379795200
• Sum of proper divisors (its aliquot sum) s(n): 36021114810
• 21358680390 is an abundant number, because the sum of its proper divisors (36021114810) is greater than itself. Its abundance is 14662434420

Bases of 21358680390

• Binary: 10011111001000100111001100101000110₂
• Hexadecimal: 0x4F9139946
• Base-36: 9T8EN9I

Squares and roots of 21358680390

• 21358680390 squared (21358680390²) is 456193228002170552100
• 21358680390 cubed (21358680390³) is 9743685352980759048573743319000
• The square root of 21358680390 is 146146.0926265221
• The cube root of 21358680390 is 2774.5430793835

Scales and comparisons

• 21,358,680,390 seconds is equal to 679 years, 7 weeks, 1 day, 22 hours, 46 minutes, 30 seconds.
• To count from 1 to 21,358,680,390 would take you about one thousand, three hundred fifty-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 21358680390 cubic inches would be around 231.2 feet tall.

Recreational maths with 21358680390

• 21358680390 backwards is 09308685312
• 21358680390 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21358680390's digits is 45
• More coming soon!