That would be 20 octillion pengo. When the forint was adopted, it was equal to 400 octillion pengo. The entire stock of pengo notes in the whole country was worth less than one tenth of a US cent. More information can be found here: http://www.tomchao.com/hb14.html Wickipedia has a section on Hungary under "hyperinflation". When I was in England in 1985, I was expecting to see the use of "milliard", not realizing it was obsolete. Nobody used billion because you might not know if it was old or new. The universal term was "thousand million". In France we have something like Mille Million = Un Milliard.