Properties of the Number -20019

Twenty Thousand Nineteen

Basics

Value: -20020 → -20019 → -20018

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 6673

Divisors: 1, 3, 6673, 20019

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100111000110011

Octal: -47063

Duodecimal: -B703

Hexadecimal: -4e33

Square: 400760361

Square Root: 141.4885154349992

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

Number T(n,k) of set partitions of [n] such that the maximal absolute difference between the least elements of consecutive blocks equals k; triangle T(n,k), n>=0, 0<=k<=max(n-1,0), read by rows. A287215

a(n) is the minimum positive integer k such that the concatenation of k, a(n-1), a(n-2), ..., a(2), and a(1) is the lesser of a pair of twin primes (i.e., a term of A001359), with a(1) = 11. A350246

Number of set partitions of [n] such that the maximal absolute difference between the least elements of consecutive blocks equals four. A322877

Let c(k) denote the k-th composite number and p(k) the k-th prime number; then a(n) = ∑_{i=n*(n-1)/2+1 .. n*(n+1)/2} c(i) - ∑_i=1..n p(i). A24850

Numbers whose trajectory under the Esucarys map ends at the fixed point 247. A129133

Odd nonprimes n such that n+d+1 is prime for all divisors d of n. A187554

Floor-Sqrt transform of Motzkin numbers (A001006). A192669