Properties of the Number 18895

Eighteen Thousand Eight Hundred Ninety-Five

Basics

Value: 18894 → 18895 → 18896

Parity: odd

Prime: No

Previous Prime: 18869

Next Prime: 18899

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 5 × 3779

Divisors: 1, 5, 3779, 18895

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100111001111

Octal: 44717

Duodecimal: AB27

Hexadecimal: 49cf

Square: 357021025

Square Root: 137.45908482162974

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Least k > 1 such that kⁿ is a twin rank (cf. A002822: 6·kⁿ +- 1 are twin primes). A326230

Dirichlet convolution of A011782 [2^n-1] with A349453 (Dirichlet inverse of A133494, 3^n-1). A349568

Total number of largest parts in all partitions of n that contain at least two distinct parts. A182629

Numbers k such that both k and k+2 are de Polignac numbers (A006285). A330284

Numbers k such that 2·10^k + 3·R_k is prime, where R_k = 11...1 is the repunit (A002275) of length k. A56701

Numbers k such that 7·10^k + 6·R_k + 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A103065

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 5", based on the 5-celled von Neumann neighborhood. A270008

Alternating sum of centered octagonal pyramidal numbers. A270695

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 261", based on the 5-celled von Neumann neighborhood. A271062

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 469", based on the 5-celled von Neumann neighborhood. A272418