Properties of the Number 18851

Eighteen Thousand Eight Hundred Fifty-One

Basics

Value: 18850 → 18851 → 18852

Parity: odd

Prime: No

Previous Prime: 18839

Next Prime: 18859

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 7 × 2693

Divisors: 1, 7, 2693, 18851

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100100110100011

Octal: 44643

Duodecimal: AAAB

Hexadecimal: 49a3

Square: 355360201

Square Root: 137.2989439143652

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

p-INVERT of the positive integers (A000027), where p(S) = 1 - S - S². A289780

Numbers that are the sum of six fourth powers in four or more ways. A345561

Numbers that are the sum of six fourth powers in exactly four ways. A345816

a(n) = n⁴ - n³ - n² - n - 1. A125082

Number of partitions p of n including floor(mean(p)) as a part. A241334

Number of colored integer partitions of n such that seven colors are used and parts differ by size or by color. A327385

a(n) = 2·a(n-1) + 7·a(n-2) for n > 1; a(0) = 1, a(1) = 7. A164544

Positive integers of the form (10·m²+1)/11. A179338

G.f.: ∑_n>=0 xⁿ * ∏_k=1..n (1 + k·x + x²). A202476

The 4k+3 integers corresponding to the record positions in A165601. A166046