Properties of the Number 20099

Twenty Thousand Ninety-Nine

Basics

Value: 20098 → 20099 → 20100

Parity: odd

Prime: No

Previous Prime: 20089

Next Prime: 20101

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 101 × 199

Divisors: 1, 101, 199, 20099

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111010000011

Octal: 47203

Duodecimal: B76B

Hexadecimal: 4e83

Square: 403969801

Square Root: 141.7709420156331

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 polyiamonds with n cells that tile the plane by 180-degree rotation (Conway criterion). A75220

Number of strict trees of weight n with distinct leaves. A300352

Odd composite integers m such that A004254(m-J(m,21)) == 0 (mod m) and gcd(m,21)=1, where J(m,21) is the Jacobi symbol. A340098

Number of tilings of a 5 X n rectangle using n pentominoes of shapes I, U, X. A247124

Numbers of the form p·q, p and q prime with q=2p-3. A226755

Number of partitions p of n such that (number of numbers in p of form 3k+1) > (number of numbers in p of form 3k+2). A241739

Odd composite integers m such that U(m)² == 1 (mod m) and V(m) == 5 (mod m), where U(m)=A004254(m) and V(m)=A003501(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=5 and b=1, respectively. A337779

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 23 ones. A31791

Number of binary strings of length n with no substrings equal to 0001 0010 or 1101. A164452

Intersection of A003052 and A283002. A283003