MATHEMATICAL NOTATION
MATHEMATICAL POWER NAME
10^18 or 1,000,000,000,000,000,000 one quintillion 10^15 or 1,000,000,000,000,000 one quadrillion 10^12 or 1,000,000,000,000 one trillion 10^9 or 1,000,000,000 one billion 10^6 or 1,000,000 one million 10^3 or 1,000 one thousand 10^2 or 100 one hundred 10^1 or 10 ten 100 or 1 one 10^-1 or 0.1 one-tenth 10^-2 or 0.01 one-hundredth 10^-3 or 0.001 one-thousandth 10^-6 or 0.000 001 one-millionth 10^-9 or 0.000 000 001 one-billionth 10^-12 or 0.000 000 000 001 one-trillionth 10^-15 or 0.000 000 000 000 001 one-quadrillionth 10^-18 or 0.000 000 000 000 000 001 one-quintillionth