Properties of the Number 20448

Twenty Thousand Four Hundred Forty-Eight

Basics

Value: 20447 → 20448 → 20449

Parity: even

Prime: No

Previous Prime: 20443

Next Prime: 20477

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁵ × 3 ² × 71

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111111100000

Octal: 47740

Duodecimal: BA00

Hexadecimal: 4fe0

Square: 418120704

Square Root: 142.99650345375582

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 n such that there exists an x≠n that makes {x,x,n} an amicable multiset. A259303

T(n,k) = Number of n X k 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. A279657

McKay-Thompson series of class 6E for Monster (and, apart from signs, of class 12B). A7258

McKay-Thompson series of class 6E for the Monster group with a(0) = 3. A105559

Numbers that belong to at least one amicable multiset. A259307

McKay-Thompson series of class 18C for the Monster group with a(0) = -3. A123676

McKay-Thompson series of class 6E for the Monster group with a(0) = -5. A128632

Expansion of χ(q)³ / χ(q³) in powers of q where χ() is a Ramanujan θ function. A132972

McKay-Thompson series of class 18C for the Monster group with a(0) = -2. A215412

McKay-Thompson series of class 36A for Monster. A58644