21642749680

Names of 21642749680

• Cardinal: 21642749680 can be written as Twenty-one billion, six hundred forty-two million, seven hundred forty-nine thousand, six hundred eighty.

Scientific notation

• Scientific notation: 2.164274968 × 10¹⁰

Factors of 21642749680

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 5768

Divisors of 21642749680

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 8 10 16 20 40 43 80 86 172 215 344 430 688 860 1487 1720 2974 3440 4231 5948 7435 8462 11896 14870 16924 21155 23792 29740 33848 42310 59480 63941 67696 84620 118960 127882 169240 181933 255764 319705 338480 363866 511528 639410 727732 909665 1023056 1278820 1455464 1819330 2557640 2910928 3638660 5115280 6291497 7277320 12582994 14554640 25165988 31457485 50331976 62914970 100663952 125829940 251659880 270534371 503319760 541068742 1082137484 1352671855 2164274968 2705343710 4328549936 5410687420 10821374840 21642749680
• Sum of all divisors σ(n): 51536415744
• Sum of proper divisors (its aliquot sum) s(n): 29893666064
• 21642749680 is an abundant number, because the sum of its proper divisors (29893666064) is greater than itself. Its abundance is 8250916384

Bases of 21642749680

• Binary: 10100001010000000100010011011110000₂
• Hexadecimal: 0x50A0226F0
• Base-36: 9XXJ8J4

Squares and roots of 21642749680

• 21642749680 squared (21642749680²) is 468408613711140102400
• 21642749680 cubed (21642749680³) is 10137650374506021063652767232000
• The square root of 21642749680 is 147114.7500422715
• The cube root of 21642749680 is 2786.7893712391

Scales and comparisons

• 21,642,749,680 seconds is equal to 688 years, 8 weeks, 6 days, 18 hours, 54 minutes, 40 seconds.
• To count from 1 to 21,642,749,680 would take you about one thousand, three hundred seventy-six 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 21642749680 cubic inches would be around 232.2 feet tall.

Recreational maths with 21642749680

• 21642749680 backwards is 08694724612
• The number of decimal digits it has is: 11
• The sum of 21642749680's digits is 49
• More coming soon!