Properties of the Number 20039

Twenty Thousand Thirty-Nine

Basics

Value: 20038 → 20039 → 20040

Parity: odd

Prime: No

Previous Prime: 20029

Next Prime: 20047

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 29 × 691

Divisors: 1, 29, 691, 20039

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111001000111

Octal: 47107

Duodecimal: B71B

Hexadecimal: 4e47

Square: 401561521

Square Root: 141.55917490576158

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

Let f(k) = exp(π*sqrt(k)); sequence gives numbers k such that ceiling(f(k)) - f(k) < 1/10³. A127022

Sum of the smallest parts of the partitions of 4n into 4 parts with smallest part greater than 1. A238706

Numbers k such that 2^k + 33 is prime. A247953

a(n) is the number of 4 element sets of integer sided trapezoids with distinct areas and base angles that are 60 degrees, which fill an equilateral triangular grid of side n units. A389518

Numbers k such that 2^k modulo Fibonacci(k) is prime, i.e., A057862(k) is prime. A128161

Least multiple of n that contains only the distinct digits of n and n+1, with each of those digits appearing at least once. A328326

Convolution of A023532 and Fibonacci numbers. A23596

Sign twisted convoluted convolved Fibonacci numbers H_j¹⁰. A89106

Nearest integer to γ(n + 2/5)/γ(2/5). A20039