Properties of the Number 19962

Nineteen Thousand Nine Hundred Sixty-Two

Basics

Value: 19961 → 19962 → 19963

Parity: even

Prime: No

Previous Prime: 19961

Next Prime: 19963

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 1109

Divisors: 1, 2, 3, 6, 9, 18, 1109, 2218, 3327, 6654

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111111010

Octal: 46772

Duodecimal: B676

Hexadecimal: 4dfa

Square: 398481444

Square Root: 141.28694207179942

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

In base 2: n sets a new record for the number of 'Reverse and Add' steps needed to reach a palindrome starting with n. A66144

Coordination sequence for Cr3Si, Si position. A9927

This is to A139025 as A139025 to A014688, see A139025 for details. A139026

At stage 1, start with a unit equilateral triangle. At each successive stage add 3*(n-1) new triangles around outside with vertex-to-vertex contacts. Sequence gives number of triangles at n-th stage. A269064

a(0) = 1; a(n) = a(n-1) + ∑_k=0..n-1 binomial(k+4,5) * a(k) * a(n-1-k). A386455

a(n) = A131668(n) - (2·n+1). A131766

Dirichlet convolution of 3^n-1 with σ(n). A34753

Interprimes which are of the form s·prime, s=18. A75293

a(n) is the smallest number m such that the sum of the digits of n+m is n. A130692

Averages of twin primes of the form : i²+j², as sum of two squares. A143793