A very big number!
In Europe an 18 digit number is in the trillions.
In the US an 18 digit number is in the quintillions.
Lots of room for misunderstanding here, best to use scientific notation!
Eighteen of them from 9 to 98
I suggest you just call it that - a "35-digit number".
I would just call it a "400-digit number".
The value of a digit in a number is called its place value.
digit
Eighteen
There are eighteen of them.
A 1000-digit number is called a "millidigit" number. The prefix "milli-" denotes one thousandth, so a millidigit number is a number consisting of 1000 digits. In the realm of mathematics, such large numbers are often encountered in fields like cryptography, number theory, and computer science.
It is called a 28-digit number!
It is called a twelve-digit number. Its exact name will depend on the number.
Eighteen of them from 9 to 98
A 22 digit number is called a quintillion.
Calling it "17-digit number" is just fine.
I suggest you just call it that - a "35-digit number".
I would just call it a "400-digit number".
The value of a digit in a number is called its place value.
We generally refer to them by the number of digits. Two-digit number, three-digit number, etc.