19902109720

Names of 19902109720

• Cardinal: 19902109720 can be written as Nineteen billion, nine hundred two million, one hundred nine thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 1.990210972 × 10¹⁰

Factors of 19902109720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1359

Divisors of 19902109720

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 5 8 10 20 40 73 146 292 365 584 730 1279 1460 2558 2920 5116 5329 6395 10232 10658 12790 21316 25580 26645 42632 51160 53290 93367 106580 186734 213160 373468 389017 466835 746936 778034 933670 1556068 1867340 1945085 3112136 3734680 3890170 6815791 7780340 13631582 15560680 27263164 34078955 54526328 68157910 136315820 272631640 497552743 995105486 1990210972 2487763715 3980421944 4975527430 9951054860 19902109720
• Sum of all divisors σ(n): 45437184000
• Sum of proper divisors (its aliquot sum) s(n): 25535074280
• 19902109720 is an abundant number, because the sum of its proper divisors (25535074280) is greater than itself. Its abundance is 5632964560

Bases of 19902109720

• Binary: 10010100010010000100001100000011000₂
• Hexadecimal: 0x4A2421818
• Base-36: 9557A54

Squares and roots of 19902109720

• 19902109720 squared (19902109720²) is 396093971306918478400
• 19902109720 cubed (19902109720³) is 7883105676380823352212250048000
• The square root of 19902109720 is 141074.8373027595
• The cube root of 19902109720 is 2709.9817866179

Scales and comparisons

• 19,902,109,720 seconds is equal to 632 years, 42 weeks, 6 days, 11 hours, 48 minutes, 40 seconds.
• To count from 1 to 19,902,109,720 would take you about one thousand, two hundred sixty-five 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 19902109720 cubic inches would be around 225.8 feet tall.

Recreational maths with 19902109720

• 19902109720 backwards is 02790120991
• 19902109720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 19902109720's digits is 40
• More coming soon!