Properties of the Number 20042

Twenty Thousand Forty-Two

Basics

Value: 20041 → 20042 → 20043

Parity: even

Prime: No

Previous Prime: 20029

Next Prime: 20047

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 11 × 911

Divisors: 1, 2, 11, 22, 911, 1822, 10021, 20042

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111001001010

Octal: 47112

Duodecimal: B722

Hexadecimal: 4e4a

Square: 401681764

Square Root: 141.56977078458522

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 paths in the first quadrant from (0,0) to (n,0) using steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0). A128720

Number of compositions (ordered partitions) of n into distinct parts, the least being 1. A339162

Consecutive internal states of the linear congruential pseudo-random number generator (421·s + 54773) mod 259200 when started at 1. A383129

Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k UUU's (triplerises) (n >= 0; 0 <= k <= n-2 for n >= 2). A128719

Number of triangular partitions of n. A89647

Triangle read by rows: T(n,k) is the number of ordered trees with n edges and having k branches of even length (n>=0, 0<=k<=floor(n/2)). A102004

Numbers k such that 303·2^k+1 is prime. A322916

2·Sum(floor(C(n,w)/w),w=1..n/2-1)+floor(C(n,n/2)/(n/2)) if n is even, otherwise 2·Sum(floor(C(n,w)/w),w=1..(n-1)/2). A85573

Numbers k such that (26·10^k - 23)/3 is prime. A276046

a(n) = round( γ(n+1/4)/γ(1/4) ). A20042