Properties of the Number 20437

Twenty Thousand Four Hundred Thirty-Seven

Basics

Value: 20436 → 20437 → 20438

Parity: odd

Prime: No

Previous Prime: 20431

Next Prime: 20441

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 107 × 191

Divisors: 1, 107, 191, 20437

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 100111111010101

Octal: 47725

Duodecimal: B9B1

Hexadecimal: 4fd5

Square: 417670969

Square Root: 142.9580358007202

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 primes less than 10000n. A38813

Number of unrooted self-avoiding walks of n steps on square lattice. A37245

T(n,k)=Number of -k..k arrays x(0..n-1) of n elements with zero sum, and adjacent elements not both strictly positive and not both strictly negative. A199898

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every consecutive three elements in every row and column having exactly two distinct values, and in every diagonal and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252695

The largest number m such that σ(m) = A007368(n), where A007368(n) = the smallest k such that σ(x) = k has exactly n solutions. A184394

Number of partitions p of n such that m(p) < m(c(p)), where m = maximal multiplicity of parts, and c = conjugate. A240726

Numbers n such that there is an integer k with the property that k^τ(n) = σ(n). A225239

Number of meanders of length n with Motzkin-steps avoiding the consecutive steps UU. A329672

a(n) = ∑_i=1..n+1 prime(i)*∑_j=0..i-1 binomial(n,j). A343414

Smallest k not a palindrome and not divisible by 10 such that k and R(k) (A004086) both are divisible by the n-th prime. A75605