21121948918

Names of 21121948918

• Cardinal: 21121948918 can be written as Twenty-one billion, one hundred twenty-one million, nine hundred forty-eight thousand, nine hundred eighteen.

Scientific notation

• Scientific notation: 2.1121948918 × 10¹⁰

Factors of 21121948918

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 461

Divisors of 21121948918

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 7 14 19 38 49 73 79 98 133 146 158 266 281 343 511 553 562 686 931 1022 1106 1387 1501 1862 1967 2774 3002 3577 3871 3934 5339 5767 6517 7154 7742 9709 10507 10678 11534 13034 13769 19418 20513 21014 22199 25039 27097 27538 37373 40369 41026 44398 50078 54194 67963 73549 74746 80738 96383 109573 135926 143591 147098 155393 192766 219146 261611 282583 287182 310786 389747 421781 475741 514843 523222 565166 767011 779494 843562 951482 1005137 1029686 1087751 1534022 1620527 1831277 1978081 2010274 2175502 2728229 2952467 3241054 3662554 3956162 5369077 5456458 5904934 7035959 7614257 10738154 11343689 14071918 15228514 19097603 20667269 22687378 30790013 37583539 38195206 41334538 61580026 75167078 79405823 133683221 144670883 158811646 215530091 267366442 289341766 431060182 555840761 1111681522 1508710637 3017421274 10560974459 21121948918
• Sum of all divisors σ(n): 40066560000
• Sum of proper divisors (its aliquot sum) s(n): 18944611082
• 21121948918 is a deficient number, because the sum of its proper divisors (18944611082) is less than itself. Its deficiency is 2177337836

Bases of 21121948918

• Binary: 10011101010111101110101110011110110₂
• Hexadecimal: 0x4EAF75CF6
• Base-36: 9PBGO3A

Squares and roots of 21121948918

• 21121948918 squared (21121948918²) is 446136726094601370724
• 21121948918 cubed (21121948918³) is 9423277139013927788005108676632
• The square root of 21121948918 is 145333.9221173089
• The cube root of 21121948918 is 2764.2543136837

Scales and comparisons

• 21,121,948,918 seconds is equal to 671 years, 31 weeks, 6 days, 1 minute, 58 seconds.
• To count from 1 to 21,121,948,918 would take you about one thousand, three hundred forty-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 21121948918 cubic inches would be around 230.4 feet tall.

Recreational maths with 21121948918

• 21121948918 backwards is 81984912112
• The number of decimal digits it has is: 11
• The sum of 21121948918's digits is 46
• More coming soon!