Properties of the Number 19838

Nineteen Thousand Eight Hundred Thirty-Eight

Basics

Value: 19837 → 19838 → 19839

Parity: even

Prime: No

Previous Prime: 19819

Next Prime: 19841

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 × 7 × 13 × 109

Divisors: 1, 2, 7, 13, 14, 26, 91, 109, 182, 218

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110101111110

Octal: 46576

Duodecimal: B592

Hexadecimal: 4d7e

Square: 393546244

Square Root: 140.84743519141554

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

Otto Haxel's guess for magic numbers of nuclear shells. A33547

Number of primitive (period n) bracelet structures using a maximum of five different colored beads. A56364

Sum of heights of all 1-watermelons with wall of length 2·n. A136439

If 0 <= n <= 3 then a(n) = n(n+1)(n+2)/3, if n >= 4 then a(n) = n(n²+5)/3. A162626

Number of ordered quadruples of integers from [ 1,n ] with no common factors between pairs. A15636

Decimal expansion of sine of 29 degrees. A19838

Primes whose base-11 expansion is a (valid) decimal expansion of a prime. A90711

a(n) is the numerator of the coefficient c_2n+1 in the expansion ∑_k=1..j 1/(k*(k+1)/2)² = ∑_m>=0 c_m/j^m for large values of j. A340277