Properties of the Number 19685

Nineteen Thousand Six Hundred Eighty-Five

Basics

Value: 19684 → 19685 → 19686

Parity: odd

Prime: No

Previous Prime: 19681

Next Prime: 19687

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 5 × 31 × 127

Divisors: 1, 5, 31, 127, 155, 635, 3937, 19685

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110011100101

Octal: 46345

Duodecimal: B485

Hexadecimal: 4ce5

Square: 387499225

Square Root: 140.30324301312496

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 that are the sum of 3 positive 9th powers. A3392

Numbers that are the sum of 5 nonzero 8th powers. A3383

Fibonacci sequence beginning 1, 7. A22097

a(n) = 3ⁿ + 2. A168607

Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) = ∑_j=1..n gcd(j, n)^k. A343510

Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the exponential transform of the k-th powers. A279636

Centered 28-gonal numbers. A195314

Partitions with superdiagonal growth: number of partitions (p0, p1, p2, ...) of n with π - p0 >= i. A238860

a(n) = n³ + 2. A84380

Number of compositions (ordered partitions) of n into distinct parts >= 3. A339101