Properties of the Number 19855

Nineteen Thousand Eight Hundred Fifty-Five

Basics

Value: 19854 → 19855 → 19856

Parity: odd

Prime: No

Previous Prime: 19853

Next Prime: 19861

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 5 × 11 × 19 ²

Divisors: 1, 5, 11, 19, 55, 95, 209, 361, 1045, 1805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110110001111

Octal: 46617

Duodecimal: B5A7

Hexadecimal: 4d8f

Square: 394221025

Square Root: 140.9077712548176

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

Generalized ordered Bell numbers Bo(5,n). A94418

Array read by antidiagonals: generalized ordered Bell numbers Bo(r,n). A94416

Form array in which n-th row is obtained by expanding (1+x+x²)ⁿ and taking the 2nd column from the center. A14531

Numbers n such that p(7n) is prime, where p(n) is the number of partitions of n. A114167

Both sum of n+1 consecutive squares and sum of the immediately following n consecutive squares. A59255

Triangle T(n,k) with the coefficient [x^k] of the series (1-x)ⁿ⁺¹ * ∑_j>=0 binomial(n+3·j,3·j)*x^j, in row n, column k. A178618

Numbers that are the sum of one or more consecutive squares in more than one way. A130052

Coefficient of xⁿ in (1+x+x²+x³+x⁴)ⁿ. A187925

Numbers that are sums of 2 or more consecutive squares in more than 1 way. A62681

Expansion of 1/(1-x*(1-9·x)). A146078