Properties of the Number 19850

Nineteen Thousand Eight Hundred Fifty

Basics

Value: 19849 → 19850 → 19851

Parity: even

Prime: No

Previous Prime: 19843

Next Prime: 19853

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 ² × 397

Divisors: 1, 2, 5, 10, 25, 50, 397, 794, 1985, 3970

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100110110001010

Octal: 46612

Duodecimal: B5A2

Hexadecimal: 4d8a

Square: 394022500

Square Root: 140.8900280360537

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

Coefficient of x⁴ in expansion of (1+x+x²)ⁿ. A5712

Binary digits, representing the rows of triangle A141743, written in base 10. A141746

Least positive integer k such that k·n+1 = prime(p) and k²*n+1 = prime(q) for some pair of primes p and q. A261437

Positions of 11's in A131744. A133152

Monotonic ordering of set S generated by these rules: if·and y are in S then 3xy-x-y is in S, and 2 is in S. A192529

Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4. A239854

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 126", based on the 5-celled von Neumann neighborhood. A270215

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 243", based on the 5-celled von Neumann neighborhood. A271002

a(n) = Trinomial(2·n+1, 4) = (1/6)*n*(2·n + 1)*(2·n² + 9·n + 1), n >= 0. A302709

Number of partitions in parts not of the form 19k, 19k+3 or 19k-3. Also number of partitions with at most 2 parts of size 1 and differences between parts at distance 8 are greater than 1. A35972