Properties of the Number 20623

Twenty Thousand Six Hundred Twenty-Three

Basics

Value: 20622 → 20623 → 20624

Parity: odd

Prime: No

Previous Prime: 20611

Next Prime: 20627

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 41 × 503

Divisors: 1, 41, 503, 20623

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000010001111

Octal: 50217

Duodecimal: BB27

Hexadecimal: 508f

Square: 425308129

Square Root: 143.60710288840173

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 non-knapsack integer partitions of n. A366754

T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without 2-loops. A221114

T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2. A221388

T(n,k) = Number of n X k arrays of occupancy after each element moves to some horizontal or vertical neighbor but without 2-loops. A217346

T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2. A221400

Number of n X 2 arrays of occupancy after each element moves to some horizontal or vertical neighbor but without 2-loops. A217340

T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no 2-loops and with no occupancy greater than 2. A217227

a(n) = number of primes p, p <= 2ⁿ, where 2ⁿ + p is composite. A175148

Number of partitions p of n such that max(p) - min(p) is not a part of p. A238494

Numbers n such that prime(n) contains a substring of all the prime digits in order, i.e., "2357". A295708