Properties of the Number 20438

Twenty Thousand Four Hundred Thirty-Eight

Basics

Value: 20437 → 20438 → 20439

Parity: even

Prime: No

Previous Prime: 20431

Next Prime: 20441

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 11 × 929

Divisors: 1, 2, 11, 22, 929, 1858, 10219, 20438

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111111010110

Octal: 47726

Duodecimal: B9B2

Hexadecimal: 4fd6

Square: 417711844

Square Root: 142.96153328780437

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 p of n such that max(p)-min(p) = 8. A218571

Left border of triangle A137629. A137631

a(n) = 169·n² - n. A157998

a(n) = 121·n² - 11. A158539

Number of compositions of n whose Lyndon and co-Lyndon factorizations both have the same length. A329394

a(n) = 5·2ⁿ⁺¹ - 3*(n+3). A169831

Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by one or less. A269607

Squared length of sum of e_lambda e_lambda', where e_lambda is an elementary symmetric function and λ ranges over all partitions of n and λ' is the adjoint (or transpose) of λ. A332302

G.f. A(x) satisfies: 0 = [xⁿ] (1+x)^n*(n-1/2) / A(x) for n>0. A304184

Numbers k such that the continued fraction for sqrt(k) has period 99. A20438