Properties of the Number 19898

Nineteen Thousand Eight Hundred Ninety-Eight

Basics

Value: 19897 → 19898 → 19899

Parity: even

Prime: No

Previous Prime: 19891

Next Prime: 19913

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 2 × 9949

Divisors: 1, 2, 9949, 19898

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110110111010

Octal: 46672

Duodecimal: B622

Hexadecimal: 4dba

Square: 395930404

Square Root: 141.06027080648894

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

a(n) = 2^n-1 - binomial(n, floor(n/2)). A93387

Triangle T(n,k) read by rows: T(n, k) = (4·n-4·k+1)*T(n-1, k-1) + (4·k-3)*T(n-1, k) + 4·T(n-2, k-1) with T(n, 1) = T(n, n) = 1. A144441

Numbers k such that 4^k + 3 is prime. A89437

Sum of the next n positive integers repeated (A008619). A319006

Numbers k such that the continued fraction for sqrt(k) has period 35. A20374

Triangle T(n,k) of numbers of proper k-covers of an unlabeled n-set, k=1..2ⁿ-2. A55127

Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k DUUU's starting at level 1. A135331

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 182", based on the 5-celled von Neumann neighborhood. A270632

Decimal expansion of sine of 89 degrees. A19898

Number of n-step excursions on the 4-dimensional f.c.c. lattice. A271432