Properties of the Number 19876

Nineteen Thousand Eight Hundred Seventy-Six

Basics

Value: 19875 → 19876 → 19877

Parity: even

Prime: No

Previous Prime: 19867

Next Prime: 19889

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 4969

Divisors: 1, 2, 4, 4969, 9938, 19876

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100110110100100

Octal: 46644

Duodecimal: B604

Hexadecimal: 4da4

Square: 395055376

Square Root: 140.98226838861686

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 (n+1)X(k+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250707

Number of regions formed after n points have been placed in general position on each edge of a triangle (as in A365929). A367015

a(0) = 1, a(n) = ∑_k=1..n stirling2(n,k) * k^3·k. A308491

Numbers n such that xⁿ + x¹³ + 1 is irreducible over GF(2). A57483

Numbers k such that 4·k + 3 is a perfect cube, sorted by absolute values. A305291

Index of first occurrence of n in A364197. A364198

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 76 ones. A31844

Expansion of (1-x)/(1+x+2·x³). A78044

Number of (n+1)X(4+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250703

Number of (1+1)X(n+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250708