21438034765

Names of 21438034765

• Cardinal: 21438034765 can be written as Twenty-one billion, four hundred thirty-eight million, thirty-four thousand, seven hundred sixty-five.

Scientific notation

• Scientific notation: 2.1438034765 × 10¹⁰

Factors of 21438034765

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 37861

Divisors of 21438034765

• Number of divisors d(n): 32
• Complete list of divisors:
  1 5 7 35 37 185 259 443 1295 2215 3101 15505 16391 37369 81955 114737 186845 261583 573685 1307915 1382653 6913265 9678571 16554467 48392855 82772335 115881269 579406345 612515279 3062576395 4287606953 21438034765
• Sum of all divisors σ(n): 30264318720
• Sum of proper divisors (its aliquot sum) s(n): 8826283955
• 21438034765 is a deficient number, because the sum of its proper divisors (8826283955) is less than itself. Its deficiency is 12611750810

Bases of 21438034765

• Binary: 10011111101110011100111001101001101₂
• Hexadecimal: 0x4FDCE734D
• Base-36: 9UJNHHP

Squares and roots of 21438034765

• 21438034765 squared (21438034765²) is 459589334585348605225
• 21438034765 cubed (21438034765³) is 9852692132463920258457810647125
• The square root of 21438034765 is 146417.3308218669
• The cube root of 21438034765 is 2777.9749397053

Scales and comparisons

• 21,438,034,765 seconds is equal to 681 years, 34 weeks, 3 days, 9 hours, 39 minutes, 25 seconds.
• To count from 1 to 21,438,034,765 would take you about one thousand, three hundred sixty-three 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 21438034765 cubic inches would be around 231.5 feet tall.

Recreational maths with 21438034765

• 21438034765 backwards is 56743083412
• The number of decimal digits it has is: 11
• The sum of 21438034765's digits is 43
• More coming soon!