Properties of the Number 18001

Eighteen Thousand One

Basics

Value: 18000 → 18001 → 18002

Parity: odd

Prime: No

Previous Prime: 17989

Next Prime: 18013

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 47 × 383

Divisors: 1, 47, 383, 18001

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

603 Try Today's Challenge

Representations

Binary: 100011001010001

Octal: 43121

Duodecimal: A501

Hexadecimal: 4651

Square: 324036001

Square Root: 134.16780537819048

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

Pseudo-squares: a(n) = the least nonsquare positive integer which is 1 mod 8 and is a (nonzero) quadratic residue modulo the first n odd primes. A2189

T(n,k)=Number of nXk 1..2 arrays with every element value z a city block distance of exactly z from another element value z. A209610

A239461(n) / n². A239464

Row sums of the triangular array A246696. A246697

Numbers b > 1 such that the smallest four primes, i.e., 2, 3, 5 and 7 are base-b Wieferich primes. A339533

Number of primitive (aperiodic) palindromic structures using a maximum of five different symbols. A56479

a(n) = 20·n² + 1. A158493

Numbers that are nontrivially palindromic in three or more consecutive integer bases. A279093

Number of primitive (period n) periodic palindromic structures using a maximum of five different symbols. A56516

a(n) = 1 + n⁴ + n⁶ + n⁹ + n¹⁰ + n¹⁴. A123659