Properties of the Number 18415

Eighteen Thousand Four Hundred Fifteen

Basics

Value: 18414 → 18415 → 18416

Parity: odd

Prime: No

Previous Prime: 18413

Next Prime: 18427

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 29 × 127

Divisors: 1, 5, 29, 127, 145, 635, 3683, 18415

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011111101111

Octal: 43757

Duodecimal: A7A7

Hexadecimal: 47ef

Square: 339112225

Square Root: 135.70187913216236

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 partitions of n into 8 or more distinct parts. A347575

Sum of the first n Sophie Germain primes. A66819

Number of binary words of length n containing at least one subword 100001 and no subwords 10ⁱ1 with i<4. A143284

Triangle read by rows: Coefficients of the polynomials N(n, x) * EZ(n, x), where N denote the Narayana polynomials A131198 and EZ the Eulerian zig-zag polynomials A205497. A373431

Divisors of 2²⁸ - 1. A3536

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 21 ones. A31789

Number of (n+2) X 6 0..2 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock. A186563

Number of (n+2)X10 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock. A186567

Number of (n+1) X (3+1) 0..1 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements. A251123

Numbers k such that A360522(k) = A360522(k+1). A360527