21007013

Names of 21007013

• Cardinal: 21007013 can be written as Twenty-one million, seven thousand and thirteen.

Scientific notation

• Scientific notation: 2.1007013 × 10⁷

Factors of 21007013

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21007013

Divisors of 21007013

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21007013
• Sum of all divisors σ(n): 21007014
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21007013 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21007012

Bases of 21007013

• Binary: 1010000001000101010100101₂
• Hexadecimal: 0x1408AA5
• Base-36: CI945

Squares and roots of 21007013

• 21007013 squared (21007013²) is 441294595182169
• 21007013 cubed (21007013³) is 9270281297821561551197
• The square root of 21007013 is 4583.3408121151
• The cube root of 21007013 is 275.9231258633

Scales and comparisons

• 21,007,013 seconds is equal to 34 weeks, 5 days, 3 hours, 16 minutes, 53 seconds.
• To count from 1 to 21,007,013 would take you about sixteen 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 21007013 cubic inches would be around 23 feet tall.

Recreational maths with 21007013

• 21007013 backwards is 31070012
• The number of decimal digits it has is: 8
• The sum of 21007013's digits is 14
• More coming soon!