Properties of the Number 20899

Twenty Thousand Eight Hundred Ninety-Nine

Basics

Value: 20898 → 20899 → 20900

Parity: odd

Prime: Yes

Previous Prime: 20897

Next Prime: 20903

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 20899

Divisors: 1, 20899

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000110100011

Octal: 50643

Duodecimal: 10117

Hexadecimal: 51a3

Square: 436768201

Square Root: 144.5648643343188

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

Primes from merging of 5 successive digits in decimal expansion of π. A104825

Smaller member of a pair (p,q) of cousin primes such that p and q are in different centuries. A160440

Iterates of A122237, starting from 5. A122244

Expansion of 1/(1 - x*∏_k>=1 (1 + x^2·k-1)). A302017

Number of digits in 10ⁿ-th Fibonacci number. A68070

Number of decimal digits in Lucas(10ⁿ). A114469

Primes which are the sum of three distinct positive cubes in two or more distinct ways. A180088

Primes p such that p - 2 and p³ - 2 are also prime. A240126

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 80 ones. A31848

Prime(prime(n)) when prime(prime(n)) and n are twin primes. A87394