What is "16?

16 is a number that comes after 15 and before 17 in the sequence of natural numbers. It is an even number and a product of two prime numbers, 2 and 8. In binary notation, 16 is written as 10000. In some cultures, 16 is considered an important milestone, such as the Sweet 16 celebration in the United States and the age of consent in many countries. In mathematics, 16 is a square number and the fourth power of 2. It is also the base of the hexadecimal numeral system often used in computing. In chemistry, 16 is the atomic number of sulfur, which is an abundant non-metal that plays an important role in many biological processes.