Properties of the Number 18810

Eighteen Thousand Eight Hundred Ten

Basics

Value: 18809 → 18810 → 18811

Parity: even

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 5 × 11 × 19

Divisors: 1, 2, 3, 5, 6, 9, 10, 11, 15, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100101111010

Octal: 44572

Duodecimal: AA76

Hexadecimal: 497a

Square: 353816100

Square Root: 137.14955340794953

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

Numbers n such that n² can be represented as sum of (at least two) consecutive cubes and n is not a triangular number. A163393

Numbers k such that σ(k) = ψ(k) + φ(k). A389478

Sum of all the parts in the partitions of n into 8 squarefree parts. A326444

Smallest n-digit triangular number - smallest n-digit number. A95865

a(n) = (n+1)(n+2)²*(n+3)²*(n+4)(2n+5)/720. A114242

Numbers n such that σ(n) = 13*φ(n) (where σ=A000203, φ=A000010). A171258

Triangle read by rows: T(n,k) = binomial(n-1,k-1)*binomial(n,k-1)/k + binomial(n-1,k)*binomial(n,k)/(k+1) (1 <= k <= n). In other words, to each entry of the Narayana triangle (A001263) add the entry on its right. A118976

Riordan array (1, x(1 - 4x)/(1 - 7x + 3x²)). A147723

Numbers with prime factorization pqrst². A189983

The stonemason's problem: numbers n such that n² is the sum of more than three consecutive cubes, the cube 1 being disallowed. A238099