Properties of the Number 20304

Twenty Thousand Three Hundred Four

Basics

Value: 20303 → 20304 → 20305

Parity: even

Prime: No

Previous Prime: 20297

Next Prime: 20323

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 ⁴ × 3 ³ × 47

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111101010000

Octal: 47520

Duodecimal: B900

Hexadecimal: 4f50

Square: 412252416

Square Root: 142.492105044455

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

Number of balanced p-trees with n leaves. A316624

Numbers k such that T(k) + T(k+1) + ... + T(k+10) is a square, where T(m) = A000217(m) is the m-th triangular number. A116476

∑_i=0..2n (C(2n,i) mod 2)*Fibonacci(i+2) = ∑_i=0..n (C(n,i) mod 2)*Fibonacci(2i+2). A48757

Irregular triangle read by rows: row n consists of the coefficients of the expansion of the polynomial (2·x + 2)ⁿ + (x² - 1)*(x + 2)ⁿ. A300184

The greedy sequence of real numbers at least 1 that do not contain any 3-term geometric progressions with integer ratio. A235054

Numbers n divisible by exactly two nontrivial permutations (rearrangements) of the digits of n. A90057

Alternating sum of the squares of the first n Fibonacci numbers with index divisible by 4. A156092

Numbers of the form p⁴*q³*r where p, q, and r are distinct primes. A179698

Number of right triangles on a centered hexagonal grid of size n. A241225

(n-1)-st elementary symmetric function of the first n terms of (2,3,1,2,3,1,2,3,1,...)=A010882. A203160