118
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 180
- Proper Divisor Sum (Aliquot Sum)
- 62
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 58
- Möbius Function
- 1
- Radical
- 118
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 33
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Names
- German
- einshundertachtzehn· ordinal: einshundertachtzehnste
- English
- one hundred eighteen· ordinal: one hundred eighteenth
- Spanish
- ciento dieciocho· ordinal: 118º
- French
- cent dix-huit· ordinal: cent dix-huitième
- Italian
- centodiciotto· ordinal: 118º
- Latin
- centum duodeviginti· ordinal: 118.
- Portuguese
- cento e dezoito· ordinal: 118º
Appears in sequences
- Number of positive integers <= 2^n of form x^2 + 10 y^2.at n=9A000024
- Coefficients of the 3rd-order mock theta function f(q).at n=31A000025
- Numbers k such that k^4 + 1 is prime.at n=19A000068
- Odious numbers: numbers with an odd number of 1's in their binary expansion.at n=59A000069
- Coefficient of q^(2n-1) in the series expansion of Ramanujan's mock theta function f(q).at n=15A000199
- Number of bipartite partitions of n white objects and 2 black ones.at n=7A000291
- One half of the number of permutations of [n] such that the differences have three runs with the same signs.at n=2A000352
- Numbers where total number of 1-bits in the exponents of their prime factorization is even; a 2-way classification of integers: complement of A000028.at n=60A000379
- Numbers that are the sum of 3 but no fewer nonzero squares.at n=49A000419
- 1 together with products of 2 or more distinct primes.at n=43A000469
- A Beatty sequence: [ n(e+1) ].at n=31A000572
- Number of monosubstituted alkanes C(n)H(2n+1)-X of the form shown in the Comments lines that are not stereoisomers.at n=12A000624
- Related to population of numbers of form x^2 + y^2.at n=8A000693
- Numbers beginning with a vowel in English.at n=32A000852
- Numbers beginning with letter 'o' in English.at n=19A000865
- Dimension of the n-th graded piece of the mod-2 Steenrod algebra A_2.at n=46A000929
- Genus of complete graph on n nodes.at n=40A000933
- Semiprimes (or biprimes): products of two primes.at n=37A001358
- Winning moves in Fibonacci nim.at n=22A001581
- Numbers with an odd number of digits.at n=28A001633