Properties of the Number 20378

Twenty Thousand Three Hundred Seventy-Eight

Basics

Value: 20377 → 20378 → 20379

Parity: even

Prime: No

Previous Prime: 20369

Next Prime: 20389

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 23 × 443

Divisors: 1, 2, 23, 46, 443, 886, 10189, 20378

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111110011010

Octal: 47632

Duodecimal: B962

Hexadecimal: 4f9a

Square: 415262884

Square Root: 142.75153239107453

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

The 180-degree spoke (or ray) of a hexagonal spiral of Ulam. A244806

Numbers k at which point A336459(k) appears multiplicative, but A051027(k) does not. A336561

Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically. A207106

E.g.f.: ∑_n>=0 a(n)*xⁿ/n! = {∑_n>=0 F(n+1)*xⁿ/n!}², where F(n) is the n-th Fibonacci number. A81057

Number of 2 X 2 matrices M with terms in {1,...,n} such that permanent(M) > n. A212241

Number of binary strings of length n with no substrings equal to 0000 0010 or 1100. A164423

Positions of 0 in A285621; complement of A285623. A285622

Positions of 0 in A285625; complement of A285627. A285626

Numbers k such that the continued fraction for sqrt(k) has period 39. A20378