11018
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 18912
- Proper Divisor Sum (Aliquot Sum)
- 7894
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4716
- Möbius Function
- -1
- Radical
- 11018
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 161
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
Appears in sequences
- Number of partitions of n into at most 8 parts.at n=41A008637
- Coordination sequence for MgNi2, Position Ni2.at n=26A009932
- Number of partitions of n into 8 unordered relatively prime parts.at n=41A023028
- T(n,0) + T(n,1) + ... + T(n,n), T given by A026714.at n=11A026721
- Number of partitions of n in which the greatest part is 8.at n=49A026814
- Number of rooted planar trees (n+1 nodes) where any 2 subtrees extending from same node are different.at n=12A032028
- Numerators of continued fraction convergents to sqrt(197).at n=2A041364
- Smallest number m such that m^2+1 is divisible by A002144(n)^2 (= squares of primes congruent to 1 mod 4).at n=16A059321
- 30*a(n) is the gap between sexy prime triples in the n-th sexy prime triple triple whose initial term is 17.at n=10A090891
- Number of partitions of n into parts but with two kinds of parts of sizes 1 to 7.at n=18A103926
- Sum of the sizes of the Durfee squares of all partitions of n into distinct parts.at n=47A116859
- Numbers beginning with a vowel in French.at n=20A118557
- a(n) = 225*n^2 - n.at n=6A156813
- a(n) = 49*n^2 - 7.at n=14A158484
- Even cyclops numbers.at n=40A162198
- Numbers n with property that there is a different number m such that the lunar squares n*n and m*m are the same.at n=7A181319
- Number of nonnegative integer arrays of length n summing to n without adjacent values differing by exactly 1.at n=10A187775
- 1-sequence of reduction of (n^3) by x^2 -> x+1.at n=7A192257
- Total number of parts of multiplicity 7 in all partitions of n.at n=40A222707
- a(n) = n*(n^2 + 3)/2.at n=28A229183