Properties of the Number 20603

Twenty Thousand Six Hundred Three

Basics

Value: 20602 → 20603 → 20604

Parity: odd

Prime: No

Previous Prime: 20599

Next Prime: 20611

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 11 × 1873

Divisors: 1, 11, 1873, 20603

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000001111011

Octal: 50173

Duodecimal: BB0B

Hexadecimal: 507b

Square: 424483609

Square Root: 143.5374515588179

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

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction. A250755

Number of polyiamonds with n cells that tile the plane by translation or by 180-degree rotation (Conway criterion). A75221

Antidiagonal-sums of absolute value of the array A378622(n,k) = n-th term of k-th differences of strict partition numbers (A000009). A378971

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A317458

a(n) = ∑_{k=0..floor(n/5)} (-1)^k * binomial(n-4·k,k) * Catalan(k). A360027

Numbers with digit sum 11 that are multiples of 11. A283742

Multiples of 11 with digit sum 11, with no zero digits in odd places. A83512

Numbers whose set of base 12 digits is {0,B}, where B base 12 = 11 base 10. A97258

Semiprimes (A001358) whose digit reversal is a pentagonal number (A000326). A115708

Number of (n+1) X (4+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction. A250751