Properties of the Number 18842

Eighteen Thousand Eight Hundred Forty-Two

Basics

Value: 18841 → 18842 → 18843

Parity: even

Prime: No

Previous Prime: 18839

Next Prime: 18859

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 9421

Divisors: 1, 2, 9421, 18842

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100110011010

Octal: 44632

Duodecimal: AAA2

Hexadecimal: 499a

Square: 355020964

Square Root: 137.26616480400406

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

Tetranacci numbers with different initial conditions: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) starting with a(0)=4, a(1)=1, a(2)=3, a(3)=7. A73817

Tetranacci numbers A073817 without the leading term 4. A1648

Numbers n such that A242719(n) = (prime(n))²+1 and A242720(n) - A242719(n) = 2*(prime(n)+1). A246748

T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. A284199

Sum of determinants of 3rd-order principal minors of powers of inverse of tetramatrix ((1,1,0,0),(1,0,1,0),(1,0,0,1),(1,0,0,0)). A74081

a(n) = n³ - (n+2)². A153258

Expansion of ∏_{i>=1, j>=1, k>=1, l>=1} (1 + x^i·j*k·l)/(1 - x^i·j*k·l). A321240

The number of small Schröder paths such that the area between the path and the x-axis contains n up-triangles. A326793

Fibonacci sequence beginning 5, 16. A22140

Exponent of least power of 2 having exactly n consecutive 6's in its decimal representation. A131540