Properties of the Number 20562

Twenty Thousand Five Hundred Sixty-Two

Basics

Value: 20561 → 20562 → 20563

Parity: even

Prime: No

Previous Prime: 20551

Next Prime: 20563

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 23 × 149

Divisors: 1, 2, 3, 6, 23, 46, 69, 138, 149, 298

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000001010010

Octal: 50122

Duodecimal: BA96

Hexadecimal: 5052

Square: 422795844

Square Root: 143.39456056629206

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

First position of n in A354578, where A354578(k) is the number of integer compositions whose run-sums constitute the k-th composition in standard order (graded reverse-lexicographic, A066099). A354905

Number of base 12 n-digit numbers with adjacent digits differing by one or less. A126366

Integers n > 10563 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 10563. A63064

Row sums of triangle A178568. A169826

Number of n X 8 binary arrays without the pattern 0 1 diagonally, vertically or antidiagonally. A188865

a(n) = floor(binomial(n,4)/4). A11850

a(n) = prime(n)*prime(n+1) - prime(n+1). A37167

If p(k) is the k-th prime, then the n-th set of 3 consecutive cousin prime pairs starts at p(a(n)). A95970

Integer lengths of the Mills primes A051254. A224845

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 318", based on the 5-celled von Neumann neighborhood. A271252