zero

0 is an even number.

0 is a palindrome.

In binary, 0 is represented as 0.

In hex, 0 is represented as 0.

0 is an Armstrong (or Narcissistic) number, which means it is the sum of its own digits each raised to the power of the number of digits.

The concept of zero was invented independently by different civilizations including the ancient Maya, Babylonians, and Indians.

The temperature scale in Celsius and Fahrenheit has the value of 0 as the freezing point of water.

Zero is the only number that cannot be represented using Roman numerals.