Properties of the Number 18423

Eighteen Thousand Four Hundred Twenty-Three

Basics

Value: 18422 → 18423 → 18424

Parity: odd

Prime: No

Previous Prime: 18413

Next Prime: 18427

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 23 × 89

Divisors: 1, 3, 9, 23, 69, 89, 207, 267, 801, 2047

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011111110111

Octal: 43767

Duodecimal: A7B3

Hexadecimal: 47f7

Square: 339406929

Square Root: 135.73135231036343

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 the same sum of unitary divisors (A034448). A64125

Fourth column (r=3) of FS(3) staircase array A062745. A62748

Moebius transform of tetrahedral numbers. A117108

Triangle read by rows: T(n,k) (n>=1, 0<=k<n) is the number of permutations of n with maximal difference k between elements in the same cycle. A263757

Number of integer compositions of n whose leaders of maximal strictly increasing runs are not weakly decreasing. A375135

Triangle read by rows: T(n,k) is the number of permutations of n elements with k the (smallest) header (first element) of the longest descending subsequence. A224652

a(n) = 729·n - 531. A156771

Triangle of coefficients of polynomials v(n,x) jointly generated with A208765; see the Formula section. A208766

Numbers n for which A325565(n) < A325568(n). A325569

Values of A038005 ending in 3. A38013