Properties of the Number 18770

Eighteen Thousand Seven Hundred Seventy

Basics

Value: 18769 → 18770 → 18771

Parity: even

Prime: No

Previous Prime: 18757

Next Prime: 18773

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 1877

Divisors: 1, 2, 5, 10, 1877, 3754, 9385, 18770

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100101010010

Octal: 44522

Duodecimal: AA42

Hexadecimal: 4952

Square: 352312900

Square Root: 137.00364958642524

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

Number of n-polyplets (polyominoes connected at edges or corners); may contain holes. A30222

a(n) = prime(n)² + 1. A66872

T(n,k)=Number of nXk nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down. A253011

The smallest numbers of every class in a classification of positive numbers (see comment). A247395

Expansion of ∏_{1 <= i < j} (1 + x^i·j). A321286

Table by antidiagonals of T(n,k) = 2·n*T(n,k-1) - n²*T(n,k-2) + T(n,k-4) starting with T(n,1) = 1. A73135

Number of emirps of length ceiling(n/4)+1 and leading digit 1, 3, 7 or 9 (in sequence). A220349

Number of minimal dominating sets in the n-web graph. A290381

Numbers n such that d(1)¹ + d(2)² + ... + d(p)^p and d(1)^p + d(2)^p-1 +... + d(p)¹ are squares, where d(i), i=1..p, are the digits of n. A178360

Number of n X 3 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down. A253006