18989721516

Names of 18989721516

• Cardinal: 18989721516 can be written as Eighteen billion, nine hundred eighty-nine million, seven hundred twenty-one thousand, five hundred sixteen.

Scientific notation

• Scientific notation: 1.8989721516 × 10¹⁰

Factors of 18989721516

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2010

Divisors of 18989721516

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 12 47 94 141 188 282 487 564 974 1461 1471 1948 2209 2922 2942 4413 4418 5844 5884 6627 8826 8836 13254 17652 22889 26508 45778 68667 69137 91556 137334 138274 207411 274668 276548 414822 716377 829644 1075783 1432754 2149131 2151566 2865508 3227349 3249439 4298262 4303132 6454698 6498878 8596524 9748317 12909396 12997756 19496634 33669719 38993268 67339438 101009157 134678876 202018314 404036628 1582476793 3164953586 4747430379 6329907172 9494860758 18989721516
• Sum of all divisors σ(n): 45395961856
• Sum of proper divisors (its aliquot sum) s(n): 26406240340
• 18989721516 is an abundant number, because the sum of its proper divisors (26406240340) is greater than itself. Its abundance is 7416518824

Bases of 18989721516

• Binary: 10001101011111000000010011110101100₂
• Hexadecimal: 0x46BE027AC
• Base-36: 8Q1ZMWC

Squares and roots of 18989721516

• 18989721516 squared (18989721516²) is 360609523255233338256
• 18989721516 cubed (18989721516³) is 6847874422634406883080469116096
• The square root of 18989721516 is 137803.1984969869
• The cube root of 18989721516 is 2667.9203843199

Scales and comparisons

• 18,989,721,516 seconds is equal to 603 years, 42 weeks, 2 days, 10 hours, 38 minutes, 36 seconds.
• To count from 1 to 18,989,721,516 would take you about one thousand, two hundred seven 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 18989721516 cubic inches would be around 222.3 feet tall.

Recreational maths with 18989721516

• 18989721516 backwards is 61512798981
• The number of decimal digits it has is: 11
• The sum of 18989721516's digits is 57
• More coming soon!