21139158

Names of 21139158

• Cardinal: 21139158 can be written as Twenty-one million, one hundred thirty-nine thousand, one hundred fifty-eight.

Scientific notation

• Scientific notation: 2.1139158 × 10⁷

Factors of 21139158

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 15359

Divisors of 21139158

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 6 233 466 699 1398 15121 30242 45363 90726 3523193 7046386 10569579 21139158
• Sum of all divisors σ(n): 42462576
• Sum of proper divisors (its aliquot sum) s(n): 21323418
• 21139158 is an abundant number, because the sum of its proper divisors (21323418) is greater than itself. Its abundance is 184260

Bases of 21139158

• Binary: 1010000101000111011010110₂
• Hexadecimal: 0x1428ED6
• Base-36: CL32U

Squares and roots of 21139158

• 21139158 squared (21139158²) is 446864000948964
• 21139158 cubed (21139158³) is 9446328720572299932312
• The square root of 21139158 is 4597.7340070953
• The cube root of 21139158 is 276.5004834163

Scales and comparisons

• 21,139,158 seconds is equal to 34 weeks, 6 days, 15 hours, 59 minutes, 18 seconds.
• To count from 1 to 21,139,158 would take you about two days!

  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 21139158 cubic inches would be around 23 feet tall.

Recreational maths with 21139158

• 21139158 backwards is 85193112
• The number of decimal digits it has is: 8
• The sum of 21139158's digits is 30
• More coming soon!