Properties of the Number 20149

Twenty Thousand One Hundred Forty-Nine

Basics

Value: 20148 → 20149 → 20150

Parity: odd

Prime: Yes

Previous Prime: 20147

Next Prime: 20161

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 20149

Divisors: 1, 20149

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 100111010110101

Octal: 47265

Duodecimal: B7B1

Hexadecimal: 4eb5

Square: 405982201

Square Root: 141.94717327231282

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 reduced words of length n in the Weyl group D₂₅. A162367

Euclid-Mullin sequence (A000945) with initial value a(1)=127 instead of a(1)=2. A51335

Numbers k such that (5^k - 2^k)/3 is prime. A82182

Primes p such that p, p+12, p+24 are consecutive primes. A52188

Primes of the form 2·n² + 22·n + 9. A154601

Mother primes of order 11. A136070

Numbers n such that n, 10·n+1, 10·n+3, 10·n+7 and 10·n+9 are all primes. A67267

Trajectory of n under the Reverse and Add! operation carried out in base 3 (presumably) does not reach a palindrome and (presumably) does not join the trajectory of any term m < n. A77405

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

First prime divisor of odd composite Mersenne prime reversals. A134039