Properties of the Number 18906

Eighteen Thousand Nine Hundred Six

Basics

Value: 18905 → 18906 → 18907

Parity: even

Prime: No

Previous Prime: 18899

Next Prime: 18911

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 23 × 137

Divisors: 1, 2, 3, 6, 23, 46, 69, 137, 138, 274

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100100111011010

Octal: 44732

Duodecimal: AB36

Hexadecimal: 49da

Square: 357436836

Square Root: 137.49909090608563

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

Positive integers k such that k-th triangular number is palindromic. A8509

Product of a prime and the following number. A36690

Integers that are Rhonda numbers to base 12. A100971

a(n) = 25·n² + 25·n + 6. A177059

Numbers k such that the prime gap between the consecutive primes p1 < k² < p2 sets a new record. A350100

Number of integer partitions of n with more than one non-co-mode. A363128

Maximum number of 6 sphinx tile shapes in a sphinx tiled hexagon of order n. A291582

Indices k such that A377091(k) is immediately followed by A377091(k+1) = -A377091(k). A379802

Index of the smallest n-digit palindromic triangular number, or 0 if no such number exists. A68642

Index of the largest n-digit palindromic triangular number, or 0 if no such number exists. A68644