21438453

Names of 21438453

• Cardinal: 21438453 can be written as Twenty-one million, four hundred thirty-eight thousand, four hundred fifty-three.

Scientific notation

• Scientific notation: 2.1438453 × 10⁷

Factors of 21438453

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 8012

Divisors of 21438453

• Number of divisors d(n): 16
• Complete list of divisors:
  1 3 29 31 87 93 899 2697 7949 23847 230521 246419 691563 739257 7146151 21438453
• Sum of all divisors σ(n): 30528000
• Sum of proper divisors (its aliquot sum) s(n): 9089547
• 21438453 is a deficient number, because the sum of its proper divisors (9089547) is less than itself. Its deficiency is 12348906

Bases of 21438453

• Binary: 1010001110001111111110101₂
• Hexadecimal: 0x1471FF5
• Base-36: CRI0L

Squares and roots of 21438453

• 21438453 squared (21438453²) is 459607267033209
• 21438453 cubed (21438453³) is 9853268792749900585677
• The square root of 21438453 is 4630.1677075459
• The cube root of 21438453 is 277.7993004775

Scales and comparisons

• 21,438,453 seconds is equal to 35 weeks, 3 days, 3 hours, 7 minutes, 33 seconds.
• To count from 1 to 21,438,453 would take you about four 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 21438453 cubic inches would be around 23.1 feet tall.

Recreational maths with 21438453

• 21438453 backwards is 35483412
• The number of decimal digits it has is: 8
• The sum of 21438453's digits is 30
• More coming soon!