Properties of the Number 20893

Twenty Thousand Eight Hundred Ninety-Three

Basics

Value: 20892 → 20893 → 20894

Parity: odd

Prime: No

Previous Prime: 20887

Next Prime: 20897

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 17 × 1229

Divisors: 1, 17, 1229, 20893

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000110011101

Octal: 50635

Duodecimal: 10111

Hexadecimal: 519d

Square: 436517449

Square Root: 144.5441109142811

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

Sums of distinct powers of 12. A33048

Expansion of f(-x³)³ / (f(-x²) * f(-x⁴)²) in powers of·where f() is a Ramanujan θ function. A262150

From Apery continued fraction for ζ(3): ζ(3)=6/(5-1⁶/(117-2⁶/(535-3⁶/(1463...)))). A6221

a(n) = 164·2ⁿ - 99. A305157

a(n) is the least k > 0 such that k and 3k are anagrams in base n (written in base 10). A23095

Squarefree semiprimes k such that k+1 is the product of three distinct primes and k+2 is the product of four distinct primes. A376352

Squarefree sums of two squares; or squarefree numbers with no prime factors of the form 4k+3. A20893

Number of (n+2)X6 binary arrays avoiding patterns 000 and 111 in rows, columns and nw-to-se diagonals. A202643

Number of n X 6 0..1 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..1 introduced in row major order. A204195