Properties of the Number 20287

Twenty Thousand Two Hundred Eighty-Seven

Basics

Value: 20286 → 20287 → 20288

Parity: odd

Prime: Yes

Previous Prime: 20269

Next Prime: 20297

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 20287

Divisors: 1, 20287

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111100111111

Octal: 47477

Duodecimal: B8A7

Hexadecimal: 4f3f

Square: 411562369

Square Root: 142.4324401251344

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

Poincaré series for invariant polynomial functions on the space of binary forms of degree 10. A293935

Mother primes of order 11. A136070

Primes from merging of 5 successive digits in decimal expansion of Catalan's constant. A104919

Primes p such that p² + 4 and p² + 10 are also primes. A237890

The first of three consecutive primes the sum of which is equal to the sum of three consecutive hexagonal numbers. A298273

a(n) = A087803(n) - n + 1. A255170

Primes in A374965 in order of their occurrence. A375028

Numbers which are primes and which remain prime for three successive applications of incrementing each digit by 2 with carries ignored. A88787

Number of distinct values taken by w^w^...^w (with n w's and parentheses inserted in all possible ways) where w is the first transfinite ordinal ω. A199812

G.f. satisfies: A(x) = (1+x·A(x)³)*(1+x²*A(x)²)*(1+x³*A(x)). A211855