21397441345

Names of 21397441345

• Cardinal: 21397441345 can be written as Twenty-one billion, three hundred ninety-seven million, four hundred forty-one thousand, three hundred forty-five.

Scientific notation

• Scientific notation: 2.1397441345 × 10¹⁰

Factors of 21397441345

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1546

Divisors of 21397441345

• Number of divisors d(n): 64
• Complete list of divisors:
  1 5 7 29 35 43 145 203 215 301 521 941 1015 1247 1505 2605 3647 4705 6235 6587 8729 15109 18235 22403 27289 32935 40463 43645 75545 105763 112015 136445 156821 191023 202315 283241 490261 528815 649687 784105 955115 1173427 1416205 2451305 3248435 3431827 4547809 5867135 8213989 14217569 17159135 21081223 22739045 41069945 71087845 99522983 105406115 147568561 497614915 611355467 737842805 3056777335 4279488269 21397441345
• Sum of all divisors σ(n): 31155632640
• Sum of proper divisors (its aliquot sum) s(n): 9758191295
• 21397441345 is a deficient number, because the sum of its proper divisors (9758191295) is less than itself. Its deficiency is 11639250050

Bases of 21397441345

• Binary: 10011111011011000110000101101000001₂
• Hexadecimal: 0x4FB630B41
• Base-36: 9TVHFEP

Squares and roots of 21397441345

• 21397441345 squared (21397441345²) is 457850496112715409025
• 21397441345 cubed (21397441345³) is 9796829135350978473290121138625
• The square root of 21397441345 is 146278.6428191073
• The cube root of 21397441345 is 2776.2204450161

Scales and comparisons

• 21,397,441,345 seconds is equal to 680 years, 19 weeks, 2 days, 13 hours, 42 minutes, 25 seconds.
• To count from 1 to 21,397,441,345 would take you about one thousand, three hundred sixty 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 21397441345 cubic inches would be around 231.4 feet tall.

Recreational maths with 21397441345

• 21397441345 backwards is 54314479312
• 21397441345 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21397441345's digits is 43
• More coming soon!