21681937998

Names of 21681937998

• Cardinal: 21681937998 can be written as Twenty-one billion, six hundred eighty-one million, nine hundred thirty-seven thousand, nine hundred ninety-eight.

Scientific notation

• Scientific notation: 2.1681937998 × 10¹⁰

Factors of 21681937998

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1774118

Divisors of 21681937998

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 42 63 97 126 194 291 582 679 873 1358 1746 2037 4074 6111 12222 1774009 3548018 5322027 10644054 12418063 15966081 24836126 31932162 37254189 74508378 111762567 172078873 223525134 344157746 516236619 1032473238 1204552111 1548709857 2409104222 3097419714 3613656333 7227312666 10840968999 21681937998
• Sum of all divisors σ(n): 54242129760
• Sum of proper divisors (its aliquot sum) s(n): 32560191762
• 21681937998 is an abundant number, because the sum of its proper divisors (32560191762) is greater than itself. Its abundance is 10878253764

Bases of 21681937998

• Binary: 10100001100010110000001111001001110₂
• Hexadecimal: 0x50C581E4E
• Base-36: 9YKV6FI

Squares and roots of 21681937998

• 21681937998 squared (21681937998²) is 470106435349116248004
• 21681937998 cubed (21681937998³) is 10192818583700333973317119255992
• The square root of 21681937998 is 147247.8794346459
• The cube root of 21681937998 is 2788.4703612705

Scales and comparisons

• 21,681,937,998 seconds is equal to 689 years, 21 weeks, 5 days, 8 hours, 33 minutes, 18 seconds.
• To count from 1 to 21,681,937,998 would take you about one thousand, three hundred seventy-eight 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 21681937998 cubic inches would be around 232.4 feet tall.

Recreational maths with 21681937998

• 21681937998 backwards is 89973918612
• 21681937998 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21681937998's digits is 63
• More coming soon!