Properties of the Number 18383

Eighteen Thousand Three Hundred Eighty-Three

Basics

Value: 18382 → 18383 → 18384

Parity: odd

Prime: No

Previous Prime: 18379

Next Prime: 18397

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 31 × 593

Divisors: 1, 31, 593, 18383

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011111001111

Octal: 43717

Duodecimal: A77B

Hexadecimal: 47cf

Square: 337934689

Square Root: 135.5839223506976

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

a(n) = pq + pr + qr with p = prime(n), q = prime(n+1), and r = prime(n+2). A127345

Composites in A127345. A127347

Somos's sequence {a(9,n)} defined in comment in A018896: a(0)= a(1) = ... = a(19) = 1; for n >= 20, a(n) = (a(n-1)*a(n-19) + a(n-10)²)/a(n-20). A271839

Numbers k of the form (x + y)*(x² + y²) such that (x + y) and (x² + y²) are primes. A349202

a(1) = 1+2-3 = 0, a(2) = 4+5+6-7 = 8, a(3) = 8+9+10+11-12 = 26, a(4) = 13+14+15+16+17-18 = 57, ... A111694

Denominator of harmonic mean of 3 consecutive primes. Numerators are A331259. A331260

Number of partitions of n into exactly 4 different parts with distinct multiplicities. A212115

Numbers n such that T(n) + T(n+1) + ... + T(n+21) is a square, where T(m) = A000217(m) is the m-th triangular number. A254443

Numbers n such that 103·2ⁿ-1 is prime. A50577

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}. A151001