21036978642

Names of 21036978642

• Cardinal: 21036978642 can be written as Twenty-one billion, thirty-six million, nine hundred seventy-eight thousand, six hundred forty-two.

Scientific notation

• Scientific notation: 2.1036978642 × 10¹⁰

Factors of 21036978642

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 60378

Divisors of 21036978642

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 3 6 83 166 249 498 709 1418 2127 4254 58847 59581 117694 119162 176541 178743 353082 357486 4945223 9890446 14835669 29671338 42242929 84485858 126728787 253457574 3506163107 7012326214 10518489321 21036978642
• Sum of all divisors σ(n): 42641645760
• Sum of proper divisors (its aliquot sum) s(n): 21604667118
• 21036978642 is an abundant number, because the sum of its proper divisors (21604667118) is greater than itself. Its abundance is 567688476

Bases of 21036978642

• Binary: 10011100101111001101101000111010010₂
• Hexadecimal: 0x4E5E6D1D2
• Base-36: 9NWVGLU

Squares and roots of 21036978642

• 21036978642 squared (21036978642²) is 442554470383964164164
• 21036978642 cubed (21036978642³) is 9310008941389075660811449785288
• The square root of 21036978642 is 145041.2997804419
• The cube root of 21036978642 is 2760.5426120203

Scales and comparisons

• 21,036,978,642 seconds is equal to 668 years, 47 weeks, 2 days, 13 hours, 10 minutes, 42 seconds.
• To count from 1 to 21,036,978,642 would take you about one thousand, three hundred thirty-seven years!

  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 21036978642 cubic inches would be around 230 feet tall.

Recreational maths with 21036978642

• 21036978642 backwards is 24687963012
• The number of decimal digits it has is: 11
• The sum of 21036978642's digits is 48
• More coming soon!