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Properties of the Number -19804

Nineteen Thousand Eight Hundred Four

Basics

Value: -19805 → -19804 → -19803

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 2 × 4951

Divisors: 1, 2, 4, 4951, 9902, 19804

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -100110101011100

Octal: -46534

Duodecimal: -B564

Hexadecimal: -4d5c

Square: 392198416

Square Root: 140.72668545801824

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 of n-step self-avoiding walks on hexagonal lattice from (0,0) to (1,1). A3291
Centered 23-gonal numbers. A69174
Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) = n! * k! * [xn * yk] 1 / (exp(x) + exp(y) - exp(x+y))4. A382736
Total number of parts of multiplicity 8 in all partitions of n. A222708
Number of partitions of n2 into at most 10 square parts. A255214
a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = (primes). A24478
Coefficients of a recursive polynomial based on Chaitin's S expressions: a(0)=1; a(1)=x; a(2)=1; a(n)=vector(a(n-1)).reverse(a(n-1)). A176703
Expansion of (1/x) * SeriesReversion( x*(1-x)/(1+x5) ). A366025
a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = (1, p(1), p(2), ...). A24470
Duplicate of A024478. A25090