Properties of the Number 19090

Nineteen Thousand Ninety

Basics

Value: 19089 → 19090 → 19091

Parity: even

Prime: No

Previous Prime: 19087

Next Prime: 19121

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 23 × 83

Divisors: 1, 2, 5, 10, 23, 46, 83, 115, 166, 230

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101010010010

Octal: 45222

Duodecimal: B06A

Hexadecimal: 4a92

Square: 364428100

Square Root: 138.16656614391198

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

Triangle Q, read by rows, where column k of Q equals column 0 of Q^k+1 and Q is equal to the matrix square of integer triangle P = A135880 such that column 0 of Q equals column 0 of P shift left. A135885

Expansion of g.f. A(x,y) satisfying y/x = ∑_n=-oo..+oo x^n*(3·n+1/2) * (A(x,y)^3·n - 1/A(x,y)^3·n+1), as a triangle read by rows. A361050

Denominators of convergents to π by Farey fractions. A63673

Triangle, read by rows equal to the matrix product P·R^-1·P, where P = A135880 and R = A135894; P·R^-1·P equals triangle Q=A135885 shifted down one row. A135899

Central terms of triangle A361050. A361538

Number of ways to write n as an ordered sum of 10 primes (counting 1 as a prime). A341989

Number of unlabeled 6-trees on n nodes. A202037

Number of (w,x,y,z) with all terms in {1,...,n} and w·x>3·y*z. A211918

a(n) = 36·n² + 2·n. A158064

Totally multiplicative sequence with a(p) = a(p-1) + 9 for prime p. A166706