Properties of the Number 18994

Eighteen Thousand Nine Hundred Ninety-Four

Basics

Value: 18993 → 18994 → 18995

Parity: even

Prime: No

Previous Prime: 18979

Next Prime: 19001

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 9497

Divisors: 1, 2, 9497, 18994

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101000110010

Octal: 45062

Duodecimal: ABAA

Hexadecimal: 4a32

Square: 360772036

Square Root: 137.81872151489435

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

Expansion of ∏_k>=1 (1 - k·x^k)^k. A266964

Expansion of 1/((1-x)²*∏_k>=1 (1-x^k)). A14153

Number of partitions of n such that neither the number of parts nor the number of distinct parts is a part. A241380

a(0) = 0, a(1) = 1 and for n >= 2, a(n) = floor(2·sqrt(a(n-2) * a(n-1))). A93333

G.f.: exp( ∑_n>=1 2^A090740(n) * xⁿ/n ) where A090740(n) = highest exponent of 2 in 3ⁿ-1. A182000

Number of partitions of n such that m(2) < m(3), where m = multiplicity. A240063

Number of 0..n arrays x(0..3) of 4 elements with zero 3rd differences. A200155

Numbers of the form 7^x + y⁷ with x, y >= 0. A250715

Numbers k such that k²+1, (k+2)²+1 and (k+6)²+1 are prime. A302021

Coordination sequence for MgNi2, Position Ni3. A9934