Properties of the Number 20903

Twenty Thousand Nine Hundred Three

Basics

Value: 20902 → 20903 → 20904

Parity: odd

Prime: Yes

Previous Prime: 20899

Next Prime: 20921

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 20903

Divisors: 1, 20903

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000110100111

Octal: 50647

Duodecimal: 1011B

Hexadecimal: 51a7

Square: 436935409

Square Root: 144.57869829265996

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 12. A293937

Primes p whose period of reciprocal equals (p-1)/7. A56212

Numbers of the form a⁵ + b⁶, with integers a, b > 0. A303375

Number of singleton-reduced unlabeled rooted trees with n nodes. A330951

Popularity of left children in treeshelves avoiding pattern T321. A278678

Riordan matrix (g(x),x·g(x)), where g(x) = (1-x-sqrt(1-2·x-3·x²-4·x³))/(2·x²*(1+x)). A190252

Primes that are each the sum of two, three, and four consecutive composite numbers. A60339

Primes in A051022. A92908

Primes of the form a⁵ + b³ with a,b>0. A100273

Primes of the form a⁵ + b⁴ with a>0. A100274