21386998

Names of 21386998

• Cardinal: 21386998 can be written as Twenty-one million, three hundred eighty-six thousand, nine hundred ninety-eight.

Scientific notation

• Scientific notation: 2.1386998 × 10⁷

Factors of 21386998

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 31166

Divisors of 21386998

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 347 694 30817 61634 10693499 21386998
• Sum of all divisors σ(n): 32173992
• Sum of proper divisors (its aliquot sum) s(n): 10786994
• 21386998 is a deficient number, because the sum of its proper divisors (10786994) is less than itself. Its deficiency is 10600004

Bases of 21386998

• Binary: 1010001100101011011110110₂
• Hexadecimal: 0x14656F6
• Base-36: CQEBA

Squares and roots of 21386998

• 21386998 squared (21386998²) is 457403683452004
• 21386998 cubed (21386998³) is 9782491663180642643992
• The square root of 21386998 is 4624.6078752689
• The cube root of 21386998 is 277.5768712717

Scales and comparisons

• 21,386,998 seconds is equal to 35 weeks, 2 days, 12 hours, 49 minutes, 58 seconds.
• To count from 1 to 21,386,998 would take you about seven 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 21386998 cubic inches would be around 23.1 feet tall.

Recreational maths with 21386998

• 21386998 backwards is 89968312
• The number of decimal digits it has is: 8
• The sum of 21386998's digits is 46
• More coming soon!