What is the number if it has 29 numbers?

Answer 1

The first whole positive number with 29 digits is 10 octillion.

This could also be expressed in a number of ways;

• 1*1028
• Ten billion billion billion
• One thousand trillion trillion

As a side note, this answer assumes the more common American short scale method of naming large numbers. The British long scale answer would be 10 thousand quadrillion.