21190021

Names of 21190021

• Cardinal: 21190021 can be written as Twenty-one million, one hundred ninety thousand and twenty-one.

Scientific notation

• Scientific notation: 2.1190021 × 10⁷

Factors of 21190021

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 298522

Divisors of 21190021

• Number of divisors d(n): 4
• Complete list of divisors:
  1 71 298451 21190021
• Sum of all divisors σ(n): 21488544
• Sum of proper divisors (its aliquot sum) s(n): 298523
• 21190021 is a deficient number, because the sum of its proper divisors (298523) is less than itself. Its deficiency is 20891498

Bases of 21190021

• Binary: 1010000110101010110000101₂
• Hexadecimal: 0x1435585
• Base-36: CM6BP

Squares and roots of 21190021

• 21190021 squared (21190021²) is 449016989980441
• 21190021 cubed (21190021³) is 9514679447042334379261
• The square root of 21190021 is 4603.2619955853
• The cube root of 21190021 is 276.7220687103

Scales and comparisons

• 21,190,021 seconds is equal to 35 weeks, 6 hours, 7 minutes, 1 second.
• To count from 1 to 21,190,021 would take you about three days!

  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 21190021 cubic inches would be around 23.1 feet tall.

Recreational maths with 21190021

• 21190021 backwards is 12009112
• The number of decimal digits it has is: 8
• The sum of 21190021's digits is 16
• More coming soon!