21420697

Names of 21420697

• Cardinal: 21420697 can be written as Twenty-one million, four hundred twenty thousand, six hundred ninety-seven.

Scientific notation

• Scientific notation: 2.1420697 × 10⁷

Factors of 21420697

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 2327

Divisors of 21420697

• Number of divisors d(n): 8
• Complete list of divisors:
  1 17 883 1427 15011 24259 1260041 21420697
• Sum of all divisors σ(n): 22722336
• Sum of proper divisors (its aliquot sum) s(n): 1301639
• 21420697 is a deficient number, because the sum of its proper divisors (1301639) is less than itself. Its deficiency is 20119058

Bases of 21420697

• Binary: 1010001101101101010011001₂
• Hexadecimal: 0x146DA99
• Base-36: CR4BD

Squares and roots of 21420697

• 21420697 squared (21420697²) is 458846259965809
• 21420697 cubed (21420697³) is 9828806704310824948873
• The square root of 21420697 is 4628.2498852157
• The cube root of 21420697 is 277.7225852595

Scales and comparisons

• 21,420,697 seconds is equal to 35 weeks, 2 days, 22 hours, 11 minutes, 37 seconds.
• To count from 1 to 21,420,697 would take you about twenty-one 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 21420697 cubic inches would be around 23.1 feet tall.

Recreational maths with 21420697

• 21420697 backwards is 79602412
• The number of decimal digits it has is: 8
• The sum of 21420697's digits is 31
• More coming soon!