Prime number 19
Representations of 19
ιθʹ
XIX
●●●●
▃▃▃▃▃
▃▃▃▃▃
▃▃▃▃▃
▃▃▃▃▃
▃▃▃▃▃
▃▃▃▃▃
Characteristics
Difference of 2 squares
Odd
Prime number
Gaussian prime
Deficient
Twin Prime