1 – One
10 – Ten
100 – One hundred
1000 – One thousand
10000 – Ten thousand
100000 – One hundred thousand
1000000 – One million
10000000 – Ten million
100000000 – One hundred million
1000000000 – One billion
10000000000 – Ten billion
100000000000 – One hundred billion
1000000000000 – One trillion
10000000000000 – Ten trillion
100000000000000 – One hundred trillion
1000000000000000 – One quadrillion.