Properties of the Number 18183

Eighteen Thousand One Hundred Eighty-Three

Basics

Value: 18182 → 18183 → 18184

Parity: odd

Prime: No

Previous Prime: 18181

Next Prime: 18191

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 11 × 19 × 29

Divisors: 1, 3, 11, 19, 29, 33, 57, 87, 209, 319

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011100000111

Octal: 43407

Duodecimal: A633

Hexadecimal: 4707

Square: 330621489

Square Root: 134.84435472054437

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

Number of polyforms with n cells on the faces of a deltoidal icositetrahedron up to rotation and reflection. A383804

Sub-Kaprekar numbers (2): n such that n=r-q and n²=q·10^m+r, for some m>=1, q>=0, 0<=r<10^m, with n not a power of 10. A118938

Numbers k of the form a - b + c, such that k³ equals the decimal concatenation a//b//c and numbers k, b, and c have the same number of digits. A259379

Composite numbers k such that σ(k)*(φ(k) + 2) is a square. A65655

Unabridged sub-Kaprekar numbers (A118936, but allowing powers of ten). A228381

Expansion of ∏_k>=1 (1 - x^k)¹¹. A10819

Sub-Kaprekar numbers: k such that k = |q - r| and k² = q·10^m + r, for some m >= 1, q >= 0, 0 <= r < 10^m, with k not a power of 10. A118936

Products p·q*r·s of distinct primes for which (p·q*r·s - 1)/2 is prime. A234498

Numbers k of the form abs(a - b + c - d) such that k⁴ equals the concatenation of a//b//c//d and numbers k,b,c,d have the same number of digits. A260193

Eleven times hexagonal numbers: a(n) = 11·n*(2·n-1). A154617