The Natural Number 11

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Properties of the Number 11

  • Because 11 is not divisible by 2 ...
    • 11 is an odd number
    • 11 has parity 1
    • 11 is not an even number
  • Because 11 has only 1 and itself as divisors ...
    • 11 is a prime number
    • 11 is not a composite number

Alternative Representations of the Number 11

  • Base 2 (binary): 1011
  • Base 8 (octal): 13
  • Base 16 (hexadecimal): B
  • Roman numeral: XI
  • Words: eleven

Divisors of the Number 11

  • 11 has 2 positive divisors: 1, 11
    • The sum of the positive divisors is 12
  • 11 has 1 proper divisor: 1
    • The sum of the proper divisors is 1
  • 11 is a deficient number since the sum of the proper divisors is less than 11
  • 11 is not a perfect number
  • 11 is not an abundant number

More Properties of the Number 11

  • 11 is not a square number
  • 11 is not a cube number
  • 11 is a palindromic number (i.e., the digits are the same forwards and backwards)
  • 11 is not a Fibonacci number
  • 11 is a Lucas number

6:15 am, Tuesday, March 28, 2017 (UTC; +0000)
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