Properties of the Number 20704

Twenty Thousand Seven Hundred Four

Basics

Value: 20703 → 20704 → 20705

Parity: even

Prime: No

Previous Prime: 20693

Next Prime: 20707

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ⁵ × 647

Divisors: 1, 2, 4, 8, 16, 32, 647, 1294, 2588, 5176

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000011100000

Octal: 50340

Duodecimal: BB94

Hexadecimal: 50e0

Square: 428655616

Square Root: 143.8888459888396

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

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 393", based on the 5-celled von Neumann neighborhood. A281742

a(n)² is the end of the first occurrence of n consecutive perfect powers, all of which are squares with exponents equal to 2 (A111245). A340664

a(n) = 81·n² - 2·n. A157507

Triangle read by rows: T(n,k) is the number of permutations of [n] that have k isolated entries (0 <= k <= n). A180196

Number of different values obtained by evaluating all different parenthesizations of 1/2/3/4/.../n. A78389

Number of positive integers with n digits that are equal both to the product of two integers ending with 4 and to that of two integers ending with 6. A347748

a(n) = a(n-2) + a(n-3), with a(0) = 3, a(1) = 2, a(2) = 6. A46877

Square root of n has the same nonzero digit in each of the first 4 places to the right of the decimal point. A73585

Number of n X 2 nonnegative integer arrays with upper left 0 and every value within 3 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down. A252932

a(n) = 3ⁿ+2·2ⁿ-3. A72674