21008997

Names of 21008997

• Cardinal: 21008997 can be written as Twenty-one million, eight thousand, nine hundred ninety-seven.

Scientific notation

• Scientific notation: 2.1008997 × 10⁷

Factors of 21008997

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 778114

Divisors of 21008997

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 9 27 778111 2334333 7002999 21008997
• Sum of all divisors σ(n): 31124480
• Sum of proper divisors (its aliquot sum) s(n): 10115483
• 21008997 is a deficient number, because the sum of its proper divisors (10115483) is less than itself. Its deficiency is 10893514

Bases of 21008997

• Binary: 1010000001001001001100101₂
• Hexadecimal: 0x1409265
• Base-36: CIAN9

Squares and roots of 21008997

• 21008997 squared (21008997²) is 441377954946009
• 21008997 cubed (21008997³) is 9272908131326838242973
• The square root of 21008997 is 4583.5572430155
• The cube root of 21008997 is 275.9318120773

Scales and comparisons

• 21,008,997 seconds is equal to 34 weeks, 5 days, 3 hours, 49 minutes, 57 seconds.
• To count from 1 to 21,008,997 would take you about seventeen hours!

  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 21008997 cubic inches would be around 23 feet tall.

Recreational maths with 21008997

• 21008997 backwards is 79980012
• The number of decimal digits it has is: 8
• The sum of 21008997's digits is 36
• More coming soon!