20989820138272785

Names of 20989820138272785

• Cardinal: 20989820138272785 can be written as Twenty quadrillion, nine hundred eighty-nine trillion, eight hundred twenty billion, one hundred thirty-eight million, two hundred seventy-two thousand, seven hundred eighty-five.

Scientific notation

• Scientific notation: 2.0989820138272785 × 10¹⁶

Factors of 20989820138272785

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 11185

Divisors of 20989820138272785

• Number of divisors d(n): 120
• Complete list of divisors:
  1 3 5 9 15 27 45 81 135 271 405 813 1355 2439 3347 4065 7317 7559 10041 12195 16735 21951 22677 30123 36585 37795 50205 68031 90369 109755 113385 150615 204093 271107 340155 451845 612279 907037 1020465 1355535 2048489 2721111 3061395 4535185 6145467 8163333 10242445 13605555 18436401 24489999 25299973 30727335 40816665 55309203 57138481 73469997 75899919 92182005 122449995 126499865 165927609 171415443 227699757 276546015 285692405 367349985 379499595 514246329 683099271 829638045 857077215 1138498785 1542738987 2049297813 2571231645 3415496355 4628216961 6856292683 7713694935 10246489065 15484528351 20568878049 23141084805 34281463415 46453585053 61706634147 77422641755 102844390245 139360755159 185119902441 191242495907 232267925265 308533170735 418082265477 555359707323 573727487721 696803775795 925599512205 956212479535 1254246796431 1721182463163 2090411327385 2776798536615 2868637438605 5163547389489 6271233982155 8605912315815 15490642168467 25817736947445 51826716390797 77453210842335 155480149172391 259133581953985 466440447517173 777400745861955 1399321342551519 2332202237585865 4197964027654557 6996606712757595 20989820138272785
• Sum of all divisors σ(n): 37781319591962496
• Sum of proper divisors (its aliquot sum) s(n): 16791499453689711
• 20989820138272785 is a deficient number, because the sum of its proper divisors (16791499453689711) is less than itself. Its deficiency is 4198320684583074

Bases of 20989820138272785

• Binary: 1001010100100100010000101010101001111011011100000010001₂
• Hexadecimal: 0x4A9221553DB811
• Base-36: 5QO9Q958C29

Squares and roots of 20989820138272785

• 20989820138272785 squared (20989820138272785²) is 440572549437041755216763071656225
• 20989820138272785 cubed (20989820138272785³) is 9247538570543801179693863511821373232560793336625
• The square root of 20989820138272785 is 144878639.3443587839
• The cube root of 20989820138272785 is 275847.8303269261

Scales and comparisons

• 20,989,820,138,272,785 seconds is equal to 667,411,354 years, 32 weeks, 1 day, 20 hours, 39 minutes, 45 seconds.
• To count from 1 to 20,989,820,138,272,785 would take you about two billion, two million, two hundred thirty-four thousand and 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 20989820138272785 cubic inches would be around 22987.3 feet tall.

Recreational maths with 20989820138272785

• 20989820138272785 backwards is 58727283102898902
• 20989820138272785 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 20989820138272785's digits is 81
• More coming soon!