Properties of the Number 20563

Twenty Thousand Five Hundred Sixty-Three

Basics

Value: 20562 → 20563 → 20564

Parity: odd

Prime: Yes

Previous Prime: 20551

Next Prime: 20593

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 20563

Divisors: 1, 20563

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000001010011

Octal: 50123

Duodecimal: BA97

Hexadecimal: 5053

Square: 422836969

Square Root: 143.3980474065111

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

T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally. A232295

Primes p such that q-p = 30, where q is the next prime after p. A124596

Largest squarefree number k such that Q(sqrt(-k)) has class number n. A38552

Discriminants of imaginary quadratic fields with class number 13 (negated). A46010

Number of partitions of 2n in which all odd parts occur with multiplicity 2. There is no restriction on the even parts. A101277

Middle of 3 consecutive prime numbers, p1, p2, p3, such that p1·p2·p3·d1·d2 = average of twin prime pairs; d1 (δ) = p2 - p1, d2 (δ) = p3 - p2. A153410

Prime(r) for r such that prime(r) - prime(r-1) = 12 and prime(r-1) - prime(r-2) = 2. A299110

Smallest prime p such that the product of q/(q-1) over the primes from prime(n) to p is greater than 2. A1275

Largest prime p==3 (mod 8) such that Q(sqrt(-p)) has class number 2n+1. A2149

Continued fraction for log(72). A16500