Even numbers in mathematics refer to integers divisible by 2, such as 0, 2, 4, 6, 8, etc. This definition has strong practical significance because even numbers are often used in various computer programs and algorithms. In addition, even numbers have many interesting properties and characteristics. For example, any even number plus another even number is even, and even numbers plus odd numbers must be odd.

In modern mathematics, even numbers are also widely used in various fields, such as algebra and geometry. In algebra, the concepts of even and odd numbers can be extended to more abstract mathematical structures, such as groups, rings and fields. In geometry, even numbers can also be seen everywhere, such as even polygons and regular polyhedrons.

Besides the mathematical definition, even numbers have some non-mathematical meanings. For example, in human society, even numbers are often regarded as lucky numbers, so in weddings, birthdays and other occasions, people will choose to use even numbers as the number of gifts or the number of candles in birthday cakes. In addition, in various traditional cultures, even numbers have many symbols and meanings related to life, such as China's gossip, Japanese rich hands and so on.