What is 13?

13 is a natural number that comes after 12 and before 14. It is an odd number and a prime number, meaning it can only be divided by 1 and itself. In Roman numerals, 13 is represented as XIII. In astrology, there are 12 zodiac signs, and the 13th sign, Ophiuchus, has been debated for centuries. In some cultures, 13 is considered an unlucky number, while in others, it is seen as lucky. There are 13 stripes on the American flag, representing the original 13 colonies. The 13th amendment to the United States Constitution abolished slavery in 1865. Additionally, there are 13 cards in each suit in a standard deck of playing cards.