18905013181920

Names of 18905013181920

• Cardinal: 18905013181920 can be written as Eighteen trillion, nine hundred five billion, thirteen million, one hundred eighty-one thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.890501318192 × 10¹³

Factors of 18905013181920

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 39385444139

Divisors of 18905013181920

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 80 96 120 160 240 480 39385444129 78770888258 118156332387 157541776516 196927220645 236312664774 315083553032 393854441290 472625329548 590781661935 630167106064 787708882580 945250659096 1181563323870 1260334212128 1575417765160 1890501318192 2363126647740 3150835530320 3781002636384 4726253295480 6301671060640 9452506590960 18905013181920
• Sum of all divisors σ(n): 59550791524560
• Sum of proper divisors (its aliquot sum) s(n): 40645778342640
• 18905013181920 is an abundant number, because the sum of its proper divisors (40645778342640) is greater than itself. Its abundance is 21740765160720

Bases of 18905013181920

• Binary: 100010011000110101010100110000101110111100000₂
• Hexadecimal: 0x1131AA985DE0
• Base-36: 6P8UCQH9C

Squares and roots of 18905013181920

• 18905013181920 squared (18905013181920²) is 357399523408568963014886400
• 18905013181920 cubed (18905013181920³) is 6756642701250921855679812337191333888000
• The square root of 18905013181920 is 4347989.5563260039
• The cube root of 18905013181920 is 26639.4749892025

Scales and comparisons

• 18,905,013,181,920 seconds is equal to 601,120 years, 48 weeks, 6 days, 22 hours, 32 minutes.
• To count from 1 to 18,905,013,181,920 would take you about one million, five hundred two thousand, eight hundred two 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 18905013181920 cubic inches would be around 2220 feet tall.

Recreational maths with 18905013181920

• 18905013181920 backwards is 02918131050981
• 18905013181920 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 18905013181920's digits is 48
• More coming soon!