A literal number can take a suffix of wei, finney, szabo or ether to convert between the subdenominations of Ether, where Ether currency numbers without a postfix are assumed to be Wei, e.g. 2 ether == 2000 finney evaluates to true.
1 ether = 1,000 Finney = 1,000,000 Szabo = 1,000,000,000 GWei = 1,000,000,000,000 MWei = 1,000,000,000,000,000 KWei = 1,000,000,000,000,000,000 Wei