Properties of the Number 18873

Eighteen Thousand Eight Hundred Seventy-Three

Basics

Value: 18872 → 18873 → 18874

Parity: odd

Prime: No

Previous Prime: 18869

Next Prime: 18899

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 233

Divisors: 1, 3, 9, 27, 81, 233, 699, 2097, 6291, 18873

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100110111001

Octal: 44671

Duodecimal: AB09

Hexadecimal: 49b9

Square: 356190129

Square Root: 137.37903770226373

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

Numbers k such that k and k+1 have same sum of divisors. A2961

Numbers k such that σ(k+1) divides σ(k), where σ(k) is the sum of positive divisors of k. A58073

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant. A186218

Numbers k such that σ(k) divides σ(k+1), where σ(k) is sum of positive divisors of k. A58072

Numbers k such that k and k+1 have the same sum but an unequal number of divisors. A54007

Numbers n such that σ(n+1) - σ(n) = k·n for some integer k, where σ(n) = A000203 (sum of divisors of n). A223136

Table of consecutive numbers with the same sum of divisors. A225757

Numbers k in A228058 such that also A001065(k) is in A228058. A325380

Number of Twopins positions. A5685

a(n) = floor(∏_k=2..n log(k)). A56690