20420745

Names of 20420745

• Cardinal: 20420745 can be written as Twenty million, four hundred twenty thousand, seven hundred forty-five.

Scientific notation

• Scientific notation: 2.0420745 × 10⁷

Factors of 20420745

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1361391

Divisors of 20420745

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 5 15 1361383 4084149 6806915 20420745
• Sum of all divisors σ(n): 32673216
• Sum of proper divisors (its aliquot sum) s(n): 12252471
• 20420745 is a deficient number, because the sum of its proper divisors (12252471) is less than itself. Its deficiency is 8168274

Bases of 20420745

• Binary: 1001101111001100010001001₂
• Hexadecimal: 0x1379889
• Base-36: C5OQX

Squares and roots of 20420745

• 20420745 squared (20420745²) is 417006826355025
• 20420745 cubed (20420745³) is 8515590064255244993625
• The square root of 20420745 is 4518.9318428141
• The cube root of 20420745 is 273.3320303659

Scales and comparisons

• 20,420,745 seconds is equal to 33 weeks, 5 days, 8 hours, 25 minutes, 45 seconds.
• To count from 1 to 20,420,745 would take you about fifty 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 20420745 cubic inches would be around 22.8 feet tall.

Recreational maths with 20420745

• 20420745 backwards is 54702402
• The number of decimal digits it has is: 8
• The sum of 20420745's digits is 24
• More coming soon!