21399481

Names of 21399481

• Cardinal: 21399481 can be written as Twenty-one million, three hundred ninety-nine thousand, four hundred eighty-one.

Scientific notation

• Scientific notation: 2.1399481 × 10⁷

Factors of 21399481

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 4151

Divisors of 21399481

• Number of divisors d(n): 8
• Complete list of divisors:
  1 17 331 3803 5627 64651 1258793 21399481
• Sum of all divisors σ(n): 22732704
• Sum of proper divisors (its aliquot sum) s(n): 1333223
• 21399481 is a deficient number, because the sum of its proper divisors (1333223) is less than itself. Its deficiency is 20066258

Bases of 21399481

• Binary: 1010001101000011110111001₂
• Hexadecimal: 0x14687B9
• Base-36: CQNY1

Squares and roots of 21399481

• 21399481 squared (21399481²) is 457937787069361
• 21399481 cubed (21399481³) is 9799630973572836401641
• The square root of 21399481 is 4625.9573063313
• The cube root of 21399481 is 277.6308654193

Scales and comparisons

• 21,399,481 seconds is equal to 35 weeks, 2 days, 16 hours, 18 minutes, 1 second.
• To count from 1 to 21,399,481 would take you about twelve 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 21399481 cubic inches would be around 23.1 feet tall.

Recreational maths with 21399481

• 21399481 backwards is 18499312
• The number of decimal digits it has is: 8
• The sum of 21399481's digits is 37
• More coming soon!