21818842

Names of 21818842

• Cardinal: 21818842 can be written as Twenty-one million, eight hundred eighteen thousand, eight hundred forty-two.

Scientific notation

• Scientific notation: 2.1818842 × 10⁷

Factors of 21818842

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 18992

Divisors of 21818842

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 593 1186 18397 36794 10909421 21818842
• Sum of all divisors σ(n): 32785236
• Sum of proper divisors (its aliquot sum) s(n): 10966394
• 21818842 is a deficient number, because the sum of its proper divisors (10966394) is less than itself. Its deficiency is 10852448

Bases of 21818842

• Binary: 1010011001110110111011010₂
• Hexadecimal: 0x14CEDDA
• Base-36: CZNIY

Squares and roots of 21818842

• 21818842 squared (21818842²) is 476061866220964
• 21818842 cubed (21818842³) is 10387118641300350603688
• The square root of 21818842 is 4671.0643326763
• The cube root of 21818842 is 279.4327034407

Scales and comparisons

• 21,818,842 seconds is equal to 36 weeks, 12 hours, 47 minutes, 22 seconds.
• To count from 1 to 21,818,842 would take you about two weeks!

  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 21818842 cubic inches would be around 23.3 feet tall.

Recreational maths with 21818842

• 21818842 backwards is 24881812
• The number of decimal digits it has is: 8
• The sum of 21818842's digits is 34
• More coming soon!