21997438974

Names of 21997438974

• Cardinal: 21997438974 can be written as Twenty-one billion, nine hundred ninety-seven million, four hundred thirty-eight thousand, nine hundred seventy-four.

Scientific notation

• Scientific notation: 2.1997438974 × 10¹⁰

Factors of 21997438974

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 23060

Divisors of 21997438974

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 6 7 9 14 18 19 21 27 38 42 49 54 57 63 98 114 126 133 147 171 189 266 294 342 361 378 399 441 513 722 798 882 931 1026 1083 1197 1323 1862 2166 2394 2527 2646 2793 3249 3591 5054 5586 6498 7182 7581 8379 9747 15162 16758 17689 19494 22743 23029 25137 35378 45486 46058 50274 53067 68229 69087 106134 136458 138174 159201 161203 207261 318402 322406 414522 437551 477603 483609 621783 875102 955206 967218 1128421 1243566 1312653 1450827 2256842 2625306 2901654 3062857 3385263 3937959 4352481 6125714 6770526 7875918 8313469 8704962 9188571 10155789 11813877 16626938 18377142 20311578 21439999 23627754 24940407 27565713 30467367 42879998 49880814 55131426 58194283 60934734 64319997 74821221 82697139 116388566 128639994 149642442 165394278 174582849 192959991 224463663 349165698 385919982 407359981 448927326 523748547 578879973 814719962 1047497094 1157759946 1222079943 1571245641 2444159886 3142491282 3666239829 7332479658 10998719487 21997438974
• Sum of all divisors σ(n): 60017101200
• Sum of proper divisors (its aliquot sum) s(n): 38019662226
• 21997438974 is an abundant number, because the sum of its proper divisors (38019662226) is greater than itself. Its abundance is 16022223252

Bases of 21997438974

• Binary: 10100011111001001100100011111111110₂
• Hexadecimal: 0x51F2647FE
• Base-36: A3SPGJI

Squares and roots of 21997438974

• 21997438974 squared (21997438974²) is 483887321414854172676
• 21997438974 cubed (21997438974³) is 10644281823115578000549568274424
• The square root of 21997438974 is 148315.3362737651
• The cube root of 21997438974 is 2801.9305977151

Scales and comparisons

• 21,997,438,974 seconds is equal to 699 years, 23 weeks, 2 days, 23 hours, 42 minutes, 54 seconds.
• To count from 1 to 21,997,438,974 would take you about one thousand, three hundred ninety-eight 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 21997438974 cubic inches would be around 233.5 feet tall.

Recreational maths with 21997438974

• 21997438974 backwards is 47983479912
• 21997438974 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21997438974's digits is 63
• More coming soon!