13218643872

Names of 13218643872

• Cardinal: 13218643872 can be written as Thirteen billion, two hundred eighteen million, six hundred forty-three thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 1.3218643872 × 10¹⁰

Factors of 13218643872

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 23960

Divisors of 13218643872

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 28 32 36 42 48 56 63 72 84 96 112 126 144 168 224 252 277 288 336 504 554 672 831 1008 1108 1662 1939 2016 2216 2493 3324 3878 4432 4986 5817 6648 7756 8864 9972 11634 13296 15512 17451 19944 23268 23671 26592 31024 34902 39888 46536 47342 62048 69804 71013 79776 93072 94684 139608 142026 165697 186144 189368 213039 279216 284052 331394 378736 426078 497091 558432 568104 662788 757472 852156 994182 1136208 1325576 1491273 1704312 1988364 2272416 2651152 2982546 3408624 3976728 5302304 5965092 6556867 6817248 7953456 11930184 13113734 15906912 19670601 23860368 26227468 39341202 45898069 47720736 52454936 59011803 78682404 91796138 104909872 118023606 137694207 157364808 183592276 209819744 236047212 275388414 314729616 367184552 413082621 472094424 550776828 629459232 734369104 826165242 944188848 1101553656 1468738208 1652330484 1888377696 2203107312 3304660968 4406214624 6609321936 13218643872
• Sum of all divisors σ(n): 43117506432
• Sum of proper divisors (its aliquot sum) s(n): 29898862560
• 13218643872 is an abundant number, because the sum of its proper divisors (29898862560) is greater than itself. Its abundance is 16680218688

Bases of 13218643872

• Binary: 1100010011111001000111111110100000₂
• Hexadecimal: 0x313E47FA0
• Base-36: 62M1EW0

Squares and roots of 13218643872

• 13218643872 squared (13218643872²) is 174732545814763152384
• 13218643872 cubed (13218643872³) is 2309727295973278191392163790848
• The square root of 13218643872 is 114972.3613395847
• The cube root of 13218643872 is 2364.4436454255

Scales and comparisons

• 13,218,643,872 seconds is equal to 420 years, 16 weeks, 1 day, 13 hours, 31 minutes, 12 seconds.
• To count from 1 to 13,218,643,872 would take you about eight hundred forty 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 13218643872 cubic inches would be around 197 feet tall.

Recreational maths with 13218643872

• 13218643872 backwards is 27834681231
• The number of decimal digits it has is: 11
• The sum of 13218643872's digits is 45
• More coming soon!