Properties of the Number 20749

Twenty Thousand Seven Hundred Forty-Nine

Basics

Value: 20748 → 20749 → 20750

Parity: odd

Prime: Yes

Previous Prime: 20747

Next Prime: 20753

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 20749

Divisors: 1, 20749

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000100001101

Octal: 50415

Duodecimal: 10011

Hexadecimal: 510d

Square: 430521001

Square Root: 144.04513181638595

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 whose base-3 representation also is the base-2 representation of a prime. A235265

Centered 28-gonal numbers. A195314

Sums of distinct powers of 12. A33048

Sums of 7 distinct powers of 3. A38469

Primes of the form k² + 13. A138375

Generalized Fibonacci numbers. A15453

Sums of 3 distinct powers of 12. A38493

Primes p that p//13 and p//31 are consecutive primes. A176601

Primes of form a²+b² such that a⁴+b⁴ and a⁸+b⁸ are primes. A182313

Centered 13-gonal (or tridecagonal) primes. A262493