Properties of the Number 19020

Nineteen Thousand Twenty

Basics

Value: 19019 → 19020 → 19021

Parity: even

Prime: No

Previous Prime: 19013

Next Prime: 19031

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 × 317

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101001001100

Octal: 45114

Duodecimal: B010

Hexadecimal: 4a4c

Square: 361760400

Square Root: 137.9130160644745

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) = (2·n-1)*(5·n²-5·n+6)/6. A63489

Icosahedral numbers: a(n) = n*(5·n² - 5·n + 2)/2. A6564

a(n) = (n + 2)*(2·n² - n + 3)/6. A56520

Number of set-systems covering n vertices where every vertex is the unique common element of some subset of the edges, also called covering T₁ set-systems. A326961

Number of n-element unlabeled ordered T₀-antichains without isolated vertices; number of T₁-hypergraphs (without empty edge and without multiple edges) on n labeled vertices. A59523

Number of permutations of [n] whose cycle lengths are Fibonacci numbers. A273001

a(n) = ∑_{k=0..floor(n/3)} binomial(3·k,2·n-6·k). A392435

Numbers k such that k³ has only even digits. A52004

Pisot sequence E(8,10), a(n) = floor( a(n-1)²/a(n-2) + 1/2 ). A10916

a(n) = 49n² - 28n - 20. A118058