21520549904

Names of 21520549904

• Cardinal: 21520549904 can be written as Twenty-one billion, five hundred twenty million, five hundred forty-nine thousand, nine hundred four.

Scientific notation

• Scientific notation: 2.1520549904 × 10¹⁰

Factors of 21520549904

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3921392

Divisors of 21520549904

• Number of divisors d(n): 40
• Complete list of divisors:
  1 2 4 7 8 14 16 28 49 56 98 112 196 343 392 686 784 1372 2744 5488 3921383 7842766 15685532 27449681 31371064 54899362 62742128 109798724 192147767 219597448 384295534 439194896 768591068 1345034369 1537182136 2690068738 3074364272 5380137476 10760274952 21520549904
• Sum of all divisors σ(n): 48625161600
• Sum of proper divisors (its aliquot sum) s(n): 27104611696
• 21520549904 is an abundant number, because the sum of its proper divisors (27104611696) is greater than itself. Its abundance is 5584061792

Bases of 21520549904

• Binary: 10100000010101110011000100000010000₂
• Hexadecimal: 0x502B98810
• Base-36: 9VWS2KW

Squares and roots of 21520549904

• 21520549904 squared (21520549904²) is 463134068170554409216
• 21520549904 cubed (21520549904³) is 9966899826306954146880165515264
• The square root of 21520549904 is 146698.8408406829
• The cube root of 21520549904 is 2781.5345246813

Scales and comparisons

• 21,520,549,904 seconds is equal to 684 years, 14 weeks, 6 days, 10 hours, 31 minutes, 44 seconds.
• To count from 1 to 21,520,549,904 would take you about one thousand, three hundred sixty-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 21520549904 cubic inches would be around 231.8 feet tall.

Recreational maths with 21520549904

• 21520549904 backwards is 40994502512
• The number of decimal digits it has is: 11
• The sum of 21520549904's digits is 41
• More coming soon!