Properties of the Number 18837

Eighteen Thousand Eight Hundred Thirty-Seven

Basics

Value: 18836 → 18837 → 18838

Parity: odd

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 13 × 23

Divisors: 1, 3, 7, 9, 13, 21, 23, 39, 63, 69

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100110010101

Octal: 44625

Duodecimal: AA99

Hexadecimal: 4995

Square: 354832569

Square Root: 137.24795080437448

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

Odd composites for which gcd(A325977(n), A325978(n)) is equal to abs(A325977(n)). A325981

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every element equal to some horizontal or antidiagonal neighbor, with top left element zero. A232316

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001. A260248

Numbers k such that the central binomial coefficient C(2k,k) is divisible by k². A121943

Pairs of deficient numbers having the same value of σ(k)/k in the order that they are found. A211680

Numbers k such that ω(k) = 4 and the largest prime factor of k equals the sum of its remaining distinct prime factors, where ω(k) = A001221(k). A383728

Numbers of the form 68+p² (where p is a prime). A138691

Odd 10-gonal (or decagonal) numbers. A28993

The number of ways to linearly order the cycles in each permutation of {1,2,...,n} where two cycles are considered identical if they have the same length. A196301

Number of partitions of 2·n into minimal numbers. A99385