Properties of the Number 20849

Twenty Thousand Eight Hundred Forty-Nine

Basics

Value: 20848 → 20849 → 20850

Parity: odd

Prime: Yes

Previous Prime: 20809

Next Prime: 20857

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 20849

Divisors: 1, 20849

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000101110001

Octal: 50561

Duodecimal: 10095

Hexadecimal: 5171

Square: 434680801

Square Root: 144.3918280236108

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

a(n) = -n³ + 7·n² - 5·n + 1. A161708

Upper ends of record gaps between numbers that are either prime or twice a prime. A290489

Non-palindromic balanced primes in base 2. A256081

Base 4 expansion of 1/n has equal percentage of each digit 0,1,2,3. A74709

a(n) = A005117(A390138(n) + 1). A390241

Fixed points when A001414 is iterated and started at factorials of prime numbers. A82086

Primes which are the sum of two numbers of the form k*(k+1)²/2. A210646

Primes of the form 2·n²+38·n+17. A243890

Base 4 expansion of 1/n has equal percentage of each digit 0,1,2,3 (primitive values of n only). A74900

Primes congruent to 22 mod 59. A142749