Properties of the Number 20634

Twenty Thousand Six Hundred Thirty-Four

Basics

Value: 20633 → 20634 → 20635

Parity: even

Prime: No

Previous Prime: 20627

Next Prime: 20639

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 19 × 181

Divisors: 1, 2, 3, 6, 19, 38, 57, 114, 181, 362

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000010011010

Octal: 50232

Duodecimal: BB36

Hexadecimal: 509a

Square: 425761956

Square Root: 143.6453967240162

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

Partial sums of A299259. A299265

Numbers equal to a permutation (or rearrangement) of the digits of the sum of their proper divisors. Rearrangements which cause leading zeros are excluded. A85844

Number of compositions of n into distinct parts with exactly ten descents. A241729

Number of n element multisets of the 10th roots of unity with zero sum. A321416

Number of nX3 0..2 arrays with no three equal values forming an isosceles right triangle, and new values introduced in 0..2 order. A274064

a(n) = 3·n³ + 3·n. A119536

T(n,k)=Number of nXk 0..2 arrays with no three equal values forming an isosceles right triangle, and new values introduced in 0..2 order. A274065

Smallest nonempty set S containing prime divisors of 10k+4 for each k in S. A20634

G.f. satisfies: A(x) = x + x*∑_n>=1 G_n(x)ⁿ, where G_n(x) is the n-th iteration of A(x) defined by G{n}(x) = G_n-1(A(x)) with G₀(x)=x. A172387