Properties of the Number 18130

Eighteen Thousand One Hundred Thirty

Basics

Value: 18129 → 18130 → 18131

Parity: even

Prime: No

Previous Prime: 18127

Next Prime: 18131

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 7 ² × 37

Divisors: 1, 2, 5, 7, 10, 14, 35, 37, 49, 70

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011011010010

Octal: 43322

Duodecimal: A5AA

Hexadecimal: 46d2

Square: 328696900

Square Root: 134.6476884316994

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 compositions of n in which the smallest part is equal to the number of parts. A98133

a(n) is the smallest number, larger than the previous, such that the RMS (Root Mean Square) of a(0) through a(n) is an integer. A141393

Sophie Germain 5-almost primes. A211162

Numbers k such that A090086(k), the smallest pseudoprime to base k (not necessarily exceeding k), is a Carmichael number. A293203

Shifts left when Dirichlet convolution with a (DC:(b,a)->c) applied 6 times. A144820

Numbers k such that A360119(k) > 1, but which have no divisors d > 1 such that d+1 is also a divisor. A360129

Triangle read by rows: T(n,k) = (n+1,k)-th element of (M⁶-M)/5, where M is the infinite lower Pascal's triangle matrix, 1<=k<=n. A96040

Number of binary strings of length n with no substrings equal to 0001 0111 or 1100. A164484

Triangle read by rows: T(n, k) = [x^k] (n·x + 1)*Hypergeometric([-n, -n + 1], [1], x). A371401

φ(n) is equal to the sum of prime factors and exponents of n-1. A39773