Properties of the Number 18958

Eighteen Thousand Nine Hundred Fifty-Eight

Basics

Value: 18957 → 18958 → 18959

Parity: even

Prime: No

Previous Prime: 18947

Next Prime: 18959

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 9479

Divisors: 1, 2, 9479, 18958

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101000001110

Octal: 45016

Duodecimal: AB7A

Hexadecimal: 4a0e

Square: 359405764

Square Root: 137.6880532217665

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

Number of, not necessarily connected, regular simple graphs on n vertices with girth exactly 3. A198313

Number of conjugacy classes in the symmetric group S_n with distinct cardinality. A73906

Expansion of ψ(x⁴) / f(-x) in powers of·where ψ(), f() are Ramanujan θ functions. A226635

Number of partitions of prime(n) into n primes. A259254

Number of distinct sums of subsets of the first n squares {1,4,9,...,n²}. A208531

Number of compositions of n into distinct parts with exactly five descents. A241724

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 78 ones. A31846

Number of (n+1) X 5 binary arrays with consecutive windows of two bits considered as a binary number nondecreasing in every row and column. A202331

Number of (undirected) cycles in the n-triangular honeycomb acute knight graph. A289901

The number of evenly tagged partitions: partitions of n elements together with an involution defined on the set of classes which has at most one fixed point, such that a class and its image have the same number of elements. A355194