Properties of the Number 18443

Eighteen Thousand Four Hundred Forty-Three

Basics

Value: 18442 → 18443 → 18444

Parity: odd

Prime: Yes

Previous Prime: 18439

Next Prime: 18451

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 18443

Divisors: 1, 18443

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100000001011

Octal: 44013

Duodecimal: A80B

Hexadecimal: 480b

Square: 340144249

Square Root: 135.8050072714552

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

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

Smallest prime p==3 (mod 8) such that Q(sqrt(-p)) has class number 2n+1. A2148

Number of partitions of n having no parts with multiplicity 5. A184640

Non-palindromic balanced primes. A256076

G.f. satisfies: A(x) = A(x²) + sqrt( A(x²) ), where A(x) = ∑_n>=1 a(n) * xⁿ / 2^A274716(n). A274717

Consecutive pairs of prime point sums in A161191 (includes triples). A161192

a(n) = 4ⁿ+3ⁿ-2ⁿ. A83319

The Pnictogen sequence: a(n) = A018227(n)-3. A271995

Primes p such that 2·p+q and 2·p+r are prime, where q and r are the next two primes after p. A340225

a(n) = n·A340339(n)+b, where b = 1 if n is even or 2 if n is odd. A340340