20949890

Names of 20949890

• Cardinal: 20949890 can be written as Twenty million, nine hundred forty-nine thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 2.094989 × 10⁷

Factors of 20949890

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 5606

Divisors of 20949890

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 5 10 13 26 29 58 65 130 145 290 377 754 1885 3770 5557 11114 27785 55570 72241 144482 161153 322306 361205 722410 805765 1611530 2094989 4189978 10474945 20949890
• Sum of all divisors σ(n): 42018480
• Sum of proper divisors (its aliquot sum) s(n): 21068590
• 20949890 is an abundant number, because the sum of its proper divisors (21068590) is greater than itself. Its abundance is 118700

Bases of 20949890

• Binary: 1001111111010101110000010₂
• Hexadecimal: 0x13FAB82
• Base-36: CH11E

Squares and roots of 20949890

• 20949890 squared (20949890²) is 438897891012100
• 20949890 cubed (20949890³) is 9194862537935483669000
• The square root of 20949890 is 4577.1049802249
• The cube root of 20949890 is 275.6727989081

Scales and comparisons

• 20,949,890 seconds is equal to 34 weeks, 4 days, 11 hours, 24 minutes, 50 seconds.
• To count from 1 to 20,949,890 would take you about fifty-one weeks!

  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 20949890 cubic inches would be around 23 feet tall.

Recreational maths with 20949890

• 20949890 backwards is 09894902
• The number of decimal digits it has is: 8
• The sum of 20949890's digits is 41
• More coming soon!