Properties of the Number 19829

Nineteen Thousand Eight Hundred Twenty-Nine

Basics

Value: 19828 → 19829 → 19830

Parity: odd

Prime: No

Previous Prime: 19819

Next Prime: 19841

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 79 × 251

Divisors: 1, 79, 251, 19829

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110101110101

Octal: 46565

Duodecimal: B585

Hexadecimal: 4d75

Square: 393189241

Square Root: 140.81548210335396

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

Numbers k such that σ(k) = σ(k+8). A15876

Numbers k such that 4 is the smallest decimal digit of k³. A291643

Number of compositions (ordered partitions) of n into distinct parts >= 5. A339103

∑_{k=1 ... floor(n/2)} A023532(k)*Fib(n-k). A24371

Number of 0..n arrays x(0..6) of 7 elements with zero 4th differences. A200274

Numbers that can be written in more than 1 way as p² + 3pq + q² with primes p < q. A218795

Numbers n such that the sum of the numbers in the Collatz (3x+1) iteration of n is a perfect square. A225866

Fibonacci sequence beginning 5, 17. A22141

s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023532, t = (F(2), F(3), F(4), ...). A25071

Decimal expansion of sine of 20 degrees. A19829