The number 10,000 is a natural number that follows 9,999 and precedes 10,001. It is often used in various contexts, such as counting, measuring, and representing large quantities. In the decimal system, it consists of four digits and is a round number, making it easy to work with in calculations. In Roman numerals, 10,000 is represented as X, which is a symbol that can also denote a variable in mathematics. The number is significant in many cultures and is often associated with milestones, such as achieving 10,000 steps in a day for fitness goals.