Properties of the Number 20449

Twenty Thousand Four Hundred Forty-Nine

Basics

Value: 20448 → 20449 → 20450

Parity: odd

Prime: No

Previous Prime: 20443

Next Prime: 20477

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 11 ² × 13 ²

Divisors: 1, 11, 13, 121, 143, 169, 1573, 1859, 20449

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111111100001

Octal: 47741

Duodecimal: BA01

Hexadecimal: 4fe1

Square: 418161601

Square Root: 143

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

Numbers of the form (11ⁱ)*(13^j). A108090

Number of nX2 binary arrays without the pattern 1 1 0 diagonally, vertically or horizontally. A188516

a(n) = (6·n + 5)². A16970

T(n,k)=Number of nXk binary arrays without the pattern 1 1 0 diagonally, vertically, antidiagonally or horizontally. A188607

T(n,k)=Number of nXk binary arrays without the pattern 0 0 1 vertically, antidiagonally or horizontally. A188851

T(n,k)=Number of nXk binary arrays without the pattern 0 0 1 antidiagonally or horizontally. A188992

T(n,k)=Number of nXk binary arrays without the pattern 0 0 1 diagonally, antidiagonally or horizontally. A189264

Perfect squares which are not the sum of two primes. A106562

Perfect squares which are neither the sum nor the difference of two primes. A106573

Squares that become prime when their most significant (or leftmost) digit is removed. A225873