What is my number

For what is my number I have learnt how to expand a big number. The evidence of the things I am learning is all on the top. I have also learnt how to write a number all in words sounding it out so that it can be easier.I have learnt how to tell if my number is even or odd. for example 21098472, this number is even because all you have to do is just look at the last number which is 2 and 2 is a even number so the whole number is even.I haven't finished this whole thing because I