The number of digits means that a number consists of several digits (the leftmost digit is not 0), and several digits are several digits, or a natural number contains several digits, which is several digits. If 2046 contains four digits, then 2046 is four digits.

Numbers refer to the position of counting units in integers, such as one, ten, hundred, thousand, ten thousand, million, ten million, one billion, one billion and so on. When counting, the counting units should be arranged in a certain order. For example, the "2" in 20 16 is the fourth from the right, that is, the number of digits where "2" is located is thousands.

Extended data:

According to China's reading habits, the four-digit classification method is adopted, that is, starting with one digit, and every four digits are one level. Units, ten, hundred and thousand are called four levels, ten thousand, one hundred thousand, one million and ten million are called ten thousand levels, one billion, one billion, ten billion and one hundred billion are called hundred million levels, and so on. Level, level, level ... called level.

At present, primary school mathematics textbooks usually emphasize four-digit level in reading and writing, but in real life, whether it is counting in banks or counting in information technology, it is usually three-digit level.

Because many countries are numbered according to three levels. In order to be consistent with international practice, China's written numbers also stipulate that the number division method is "three-digit system", but instead of using paragraph numbers, only half numbers are left between two adjacent paragraphs.

Reference source: Baidu Encyclopedia-Numbers

Reference source: Baidu Encyclopedia-Numbers