Properties of the Number 18871

Eighteen Thousand Eight Hundred Seventy-One

Basics

Value: 18870 → 18871 → 18872

Parity: odd

Prime: No

Previous Prime: 18869

Next Prime: 18899

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 113 × 167

Divisors: 1, 113, 167, 18871

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100110110111

Octal: 44667

Duodecimal: AB07

Hexadecimal: 49b7

Square: 356114641

Square Root: 137.37175837849642

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

Index where prime(n) appears as a term in A379248. A379290

Numbers n for which A326073(n) is equal to abs(1+A326146(n)). A326074

The largest number m such that σ(m) = A007368(n), where A007368(n) = the smallest k such that σ(x) = k has exactly n solutions. A184394

Decimal part of n-th root of a(n) starts with digit 2. A34079

Totally multiplicative sequence with a(p) = a(p-1) + 6 for prime p. A166703

Number of planar graphs with n nodes and chromatic number 2. A164099

Numbers obtained by alternatively adding centered pentagonal layers of 5*(2ⁿ-1) and 5*(3ⁿ-1) elements. A276917

Smallest fifth power that begins with n. A18871

Number of nX3 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 nX3 array. A219622