Properties of the Number 20345

Twenty Thousand Three Hundred Forty-Five

Basics

Value: 20344 → 20345 → 20346

Parity: odd

Prime: No

Previous Prime: 20341

Next Prime: 20347

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 × 13 × 313

Divisors: 1, 5, 13, 65, 313, 1565, 4069, 20345

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111101111001

Octal: 47571

Duodecimal: B935

Hexadecimal: 4f79

Square: 413919025

Square Root: 142.63590010933433

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 integer partitions of n that can be partitioned into distinct pairs of distinct parts, i.e., into a set of edges. A339560

Number of unlabeled loopless multigraphs with n edges rooted at two noninterchangeable vertices. A339065

Records in A086068. A86069

a(n) is the smallest number greater than a(n-1) such that in a(0) through a(n) no digit occurs more than once more than any other digit. A95204

Terms of A122782 which are not Carmichael numbers A002997. A153515

Number of partitions of n into its divisors that are powers of primes (A000961) with at least one part of size 1. A14650

Numbers that are both binary palindromes and binary Smith numbers. A334530

Let b(n) be the n-th positive integer that is a palindrome in base 2. a(n) = the smallest multiple of b(n) that is > b(n) and that is also a palindrome in binary. A162843

Riordan array (f(x), x·f(x)) where f(x) is the g.f. of A104455. A171589

Potential magic constants of 9 X 9 magic squares composed of consecutive primes. A191679