21429957

Names of 21429957

• Cardinal: 21429957 can be written as Twenty-one million, four hundred twenty-nine thousand, nine hundred fifty-seven.

Scientific notation

• Scientific notation: 2.1429957 × 10⁷

Factors of 21429957

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 7143322

Divisors of 21429957

• Number of divisors d(n): 4
• Complete list of divisors:
  1 3 7143319 21429957
• Sum of all divisors σ(n): 28573280
• Sum of proper divisors (its aliquot sum) s(n): 7143323
• 21429957 is a deficient number, because the sum of its proper divisors (7143323) is less than itself. Its deficiency is 14286634

Bases of 21429957

• Binary: 1010001101111111011000101₂
• Hexadecimal: 0x146FEC5
• Base-36: CRBGL

Squares and roots of 21429957

• 21429957 squared (21429957²) is 459243057021849
• 21429957 cubed (21429957³) is 9841558964526772130493
• The square root of 21429957 is 4629.2501552625
• The cube root of 21429957 is 277.7625985957

Scales and comparisons

• 21,429,957 seconds is equal to 35 weeks, 3 days, 45 minutes, 57 seconds.
• To count from 1 to 21,429,957 would take you about eight minutes!

  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 21429957 cubic inches would be around 23.1 feet tall.

Recreational maths with 21429957

• 21429957 backwards is 75992412
• The number of decimal digits it has is: 8
• The sum of 21429957's digits is 39
• More coming soon!