31638311821

Names of 31638311821

• Cardinal: 31638311821 can be written as Thirty-one billion, six hundred thirty-eight million, three hundred eleven thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 3.1638311821 × 10¹⁰

Factors of 31638311821

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 139376050

Divisors of 31638311821

• Number of divisors d(n): 4
• Complete list of divisors:
  1 227 139375823 31638311821
• Sum of all divisors σ(n): 31777687872
• Sum of proper divisors (its aliquot sum) s(n): 139376051
• 31638311821 is a deficient number, because the sum of its proper divisors (139376051) is less than itself. Its deficiency is 31498935770

Bases of 31638311821

• Binary: 11101011101110010100101001110001101₂
• Hexadecimal: 0x75DCA538D
• Base-36: EJ8MTN1

Squares and roots of 31638311821

• 31638311821 squared (31638311821²) is 1000982774882828336041
• 31638311821 cubed (31638311821³) is 31669405159192769634079730640661
• The square root of 31638311821 is 177871.6161196047
• The cube root of 31638311821 is 3162.7954160361

Scales and comparisons

• 31,638,311,821 seconds is equal to 1,006 years, 3 hours, 57 minutes, 1 second.
• To count from 1 to 31,638,311,821 would take you about two thousand and twelve 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 31638311821 cubic inches would be around 263.6 feet tall.

Recreational maths with 31638311821

• 31638311821 backwards is 12811383613
• The number of decimal digits it has is: 11
• The sum of 31638311821's digits is 37
• More coming soon!