21420667

Names of 21420667

• Cardinal: 21420667 can be written as Twenty-one million, four hundred twenty thousand, six hundred sixty-seven.

Scientific notation

• Scientific notation: 2.1420667 × 10⁷

Factors of 21420667

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21420667

Divisors of 21420667

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21420667
• Sum of all divisors σ(n): 21420668
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21420667 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21420666

Bases of 21420667

• Binary: 1010001101101101001111011₂
• Hexadecimal: 0x146DA7B
• Base-36: CR4AJ

Squares and roots of 21420667

• 21420667 squared (21420667²) is 458844974724889
• 21420667 cubed (21420667³) is 9828765408205263880963
• The square root of 21420667 is 4628.2466442487
• The cube root of 21420667 is 277.7224556079

Scales and comparisons

• 21,420,667 seconds is equal to 35 weeks, 2 days, 22 hours, 11 minutes, 7 seconds.
• To count from 1 to 21,420,667 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 21420667 cubic inches would be around 23.1 feet tall.

Recreational maths with 21420667

• 21420667 backwards is 76602412
• The number of decimal digits it has is: 8
• The sum of 21420667's digits is 28
• More coming soon!