16911
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 24440
- Proper Divisor Sum (Aliquot Sum)
- 7529
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11268
- Möbius Function
- 0
- Radical
- 5637
- Omega Function (Ω)
- 3
- 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
- 203
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- no
- Odd
- yes
Appears in sequences
- Expansion of 1/(1-x^5-x^6-x^7-x^8-x^9-x^10-x^11).at n=45A017842
- Numbers n such that 49*2^n-1 is prime.at n=22A050550
- Numbers k such that sigma(k-3) + sigma(k+3) = sigma(2*k).at n=19A067129
- Expansion of (1-x)/(1-2*x+x^2+2*x^3).at n=19A078002
- Difference between the arithmetic mean of the neighbors of the terms and the term itself follows the pattern 0,1,2,3,4,5,...at n=38A086514
- Number of 4-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=29A187509
- 0-sequence of reduction of triangular number sequence by x^2 -> x+1.at n=12A192244
- c-perfect numbers.at n=4A233416
- Number of (n+1) X (n+1) 0..1 arrays with no 2 X 2 subblock having zero or two 1's.at n=3A251211
- Number of (n+1)X(4+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.at n=3A251215
- T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having zero or two 1s.at n=24A251219
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 193", based on the 5-celled von Neumann neighborhood.at n=30A270687
- Difference between upper and lower member of a pair of adjacent perfect powers A340700 and A340701, both with exponents > 2.at n=20A340706
- Records in A352187.at n=50A352191
- Numbers k such that A163511(k) is a fifth power.at n=28A365802
- Total number of partitions of [n-s] whose block maxima sum to s, summed over all s.at n=37A368102