Properties of the Number 19996

Nineteen Thousand Nine Hundred Ninety-Six

Basics

Value: 19995 → 19996 → 19997

Parity: even

Prime: No

Previous Prime: 19993

Next Prime: 19997

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 4999

Divisors: 1, 2, 4, 4999, 9998, 19996

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111000011100

Octal: 47034

Duodecimal: B6A4

Hexadecimal: 4e1c

Square: 399840016

Square Root: 141.40721339450826

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..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A281400

T(n,k) = Equals two maps: number of n X k binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 n X k array. A221290

T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero. A230275

a(n) = p(n)*p(n+2) - 3·p(n+1), where p(n) is the n-th prime. A152528

T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..2 nXk array. A220935

Numbers n such that the digits of n end in φ(n). A67206

a(n) = k where R(k+4) = 2. A86940

Number of fanout-free Boolean functions of n variables using And, Or and Not gates. A5737

Numbers n such that φ(n) is a proper substring of n. A66663

Numbers k such that (k!! + (k+1)!! - 1)/2 is prime. A76209