Properties of the Number 18803

Eighteen Thousand Eight Hundred Three

Basics

Value: 18802 → 18803 → 18804

Parity: odd

Prime: Yes

Previous Prime: 18797

Next Prime: 18839

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 18803

Divisors: 1, 18803

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100101110011

Octal: 44563

Duodecimal: AA6B

Hexadecimal: 4973

Square: 353552809

Square Root: 137.12403144598687

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

G.f.: ∏_k>=1 (1 + x^{2·k - 1}) / (1 - x^2·k). A6950

Number of ordered trees with n edges and no unary or binary nodes. A114997

Reflectable emirps. A7628

Number of partitions of n containing a clique of size 2. A183559

Smallest prime p(k) such that the number of distinct prime divisors of all composite numbers between p(k) and p(k+1) is n. A75580

Primes p such that q-p = 36, where q is the next prime after p. A134117

a(1) = 3; a(n) = smallest number such that the forward as well as the reverse n-th partial concatenation is a prime for n>1. A83993

Primes p such that continued fraction of (1 + sqrt(p))/2 has period 6: primes in A146331. A146351

Bisection of A006950 (the odd part). A233759

Let N(p,i) denote the result of applying "nextprime" i times to p; a(n) = smallest prime p such that N(p,3) - p = 2·n, or -1 if no such prime exists. A339943