Properties of the Number 20195

Twenty Thousand One Hundred Ninety-Five

Basics

Value: 20194 → 20195 → 20196

Parity: odd

Prime: No

Previous Prime: 20183

Next Prime: 20201

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 7 × 577

Divisors: 1, 5, 7, 35, 577, 2885, 4039, 20195

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111011100011

Octal: 47343

Duodecimal: B82B

Hexadecimal: 4ee3

Square: 407838025

Square Root: 142.10911300827965

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) = 2ⁿ + 3ⁿ. A7689

Numbers that are the sum of 2 positive 9th powers. A3391

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

Sum of the 9th powers of the primes dividing n. A351197

a(n) = n⁹ * ∑_{p∣n, p prime} 1/p⁹. A351249

Coefficient of xⁿ in (1 - (n-1)*x - n·x²)ⁿ. A307885

Centered cube numbers: a(n) = (n+1)⁹ + n⁹. A36087

The r-th term of the n-th row of the following array contains the sum of r successively decreasing integers beginning from n. 0 < r <= n. Sequence contains the leading diagonal. A110427

Triangle read by rows: T(n,m), n >= 1, 1 <= m <= n, is number of partitions of the set {1,2,...,n} that have at most one block contained in {1,...,m}. A362924

Expansion of (1 - 3·x + x²)/((1-2·x)*(1-3·x)). A85281