Ten billion.
10-12 is called one trillionth.
24
-10 & -18
10 to the negative 18th power is equal to 1 divided by 10 to the 18th power. In other words, it is equal to 0.000000000000000001, or 1 divided by 1 followed by 18 zeros. This number is a very small decimal fraction, indicating a minute value.
1,000,000,000,000,000,000
1000000000000000000
Power: 10-18 Symbol: a
10 to the 63rd power
180,000
10^18= 10,000,000,000,000,000,000 which is ten quintillion
10^18 = 1e+18 = 1x10 to the 18th power
18^2 = 3.24*10^2
-10
Ten billion.
The charge on one electron is approximately -1.6 x 10^-19 coulombs. This value is considered a fundamental constant in physics and has been measured with high accuracy through experiments such as the Millikan oil drop experiment.
As far as I know, it doesn't have a special name. It's 10^(10^googol) = 10^[10^(10^100)] where the symbol ^ means 'to the power of'.