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Properties of the Number 19305

Nineteen Thousand Three Hundred Five

Basics

Value: 19304 → 19305 → 19306

Parity: odd

Prime: No

Previous Prime: 19301

Next Prime: 19309

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 3 × 5 × 11 × 13

Divisors: 1, 3, 5, 9, 11, 13, 15, 27, 33, 39

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 100101101101001

Octal: 45551

Duodecimal: B209

Hexadecimal: 4b69

Square: 372683025

Square Root: 138.94243412291294

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

a(n) = a(n-1) + 4·a(n-2), a(0) = a(1) = 1. A6131
n-φ-torial, or φ-torial of n: Product k, 1 <= k <= n, k relatively prime to n. A1783
a(n) = binomial(n+7, 7)*(n+4)/4. A53347
Longest edge a of smallest (measured by the longest edge) primitive Euler bricks (a, b, c, sqrt(a2 + b2), sqrt(b2 + c2), sqrt(a2 + c2) are integers). A31173
Odd infinitary abundant numbers. A127666
Odd bi-unitary abundant numbers: odd numbers k such that bsigma(k) > 2·k, where bsigma is the sum of the bi-unitary divisors function (A188999). A293186
28-gonal numbers: a(n) = n*(13·n - 12). A161935
Numbers k such that k and k + 1 are both lazy-Lucas-Niven numbers (A351719). A351720
Central elements of the (1,2)-Pascal triangle A029635. A29651
Dimensions of the irreducible representations of the simple Lie algebra of type E6 over the complex numbers, listed in increasing order. A121737

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