21008453

Names of 21008453

• Cardinal: 21008453 can be written as Twenty-one million, eight thousand, four hundred fifty-three.

Scientific notation

• Scientific notation: 2.1008453 × 10⁷

Factors of 21008453

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 13723

Divisors of 21008453

• Number of divisors d(n): 8
• Complete list of divisors:
  1 23 67 1541 13633 313559 913411 21008453
• Sum of all divisors σ(n): 22250688
• Sum of proper divisors (its aliquot sum) s(n): 1242235
• 21008453 is a deficient number, because the sum of its proper divisors (1242235) is less than itself. Its deficiency is 19766218

Bases of 21008453

• Binary: 1010000001001000001000101₂
• Hexadecimal: 0x1409045
• Base-36: CIA85

Squares and roots of 21008453

• 21008453 squared (21008453²) is 441355097453209
• 21008453 cubed (21008453³) is 9272187821156160975677
• The square root of 21008453 is 4583.4979000759
• The cube root of 21008453 is 275.9294304281

Scales and comparisons

• 21,008,453 seconds is equal to 34 weeks, 5 days, 3 hours, 40 minutes, 53 seconds.
• To count from 1 to 21,008,453 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 21008453 cubic inches would be around 23 feet tall.

Recreational maths with 21008453

• 21008453 backwards is 35480012
• 21008453 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21008453's digits is 23
• More coming soon!