Properties of the Number 20165

Twenty Thousand One Hundred Sixty-Five

Basics

Value: 20164 → 20165 → 20166

Parity: odd

Prime: No

Previous Prime: 20161

Next Prime: 20173

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 × 37 × 109

Divisors: 1, 5, 37, 109, 185, 545, 4033, 20165

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111011000101

Octal: 47305

Duodecimal: B805

Hexadecimal: 4ec5

Square: 406627225

Square Root: 142.00352108310554

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 k such that k, k+1, k+2 and k+3 have the same number of divisors. A6601

Numbers n for which there are exactly six k such that n = k + (product of nonzero digits of k). A96927

Numbers of the form m² + 1 that can be expressed in more than one way as j² + k² with j > k > 1. A299708

Expansion of ∏_k>=1 ((1 - x^7*(2·k-1)) * (1 - x^7·k) / (1 - x^k)). A280937

Numbers of the form m² + 1 that can be expressed in more than one way as j² + k² with j > k > 1 and gcd(j,k) = 1. A300166

McKay-Thompson series of class 8C for Monster. A52241

a(n) = 13·n² - 16·n + 5. A202141

Fixed points of A275957; numbers n for which A060125(n) = A225901(n). A275843

Expansion of (χ(q)⁵ * χ(-q))² in powers of q where χ() is a Ramanujan θ function. A143894

Hypotenuses of primitive Pythagorean triples in A195565 and A195566. A195567