Properties of the Number 20041

Twenty Thousand Forty-One

Basics

Value: 20040 → 20041 → 20042

Parity: odd

Prime: No

Previous Prime: 20029

Next Prime: 20047

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 7 ² × 409

Divisors: 1, 7, 49, 409, 2863, 20041

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111001001001

Octal: 47111

Duodecimal: B721

Hexadecimal: 4e49

Square: 401641681

Square Root: 141.56623891309678

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

Multiples of 7 whose sum of digits is equal to 7. A63416

a(n) = n*(13·n² - 7)/6. A62025

T(n,k) = number of n-bead necklaces labeled with numbers -k..k not allowing reversal, with sum zero. A208597

Number of integer partitions of n having no permutation with all equal run-lengths. A382915

Numbers such that the digital sum base 2 and the digital sum base 3 and the digital sum base 10 all are equal. A135120

Expansion of e.g.f. 1/(2 - exp(3·x))^1/3. A352118

Antidiagonal sums of the antidiagonals of Losanitsch's triangle. A102543

Irregular table whose rows list the nontrivial cycles of the ghost iteration A329201, starting with the smallest member. A329342

Numbers m such that Stern polynomial B(m,x) has no irreducible polynomial factors that themselves are Stern polynomials. The initial a(1) = 1 is included by convention. A389918

G.f. A(x) satisfies A(x) = 1/((1 - x·A(x)²) * (1 - x·A(x))). A379209