3,632,004,540 is the current O/S
181,600,227 = 5% of the current outstanding shares
181,600,227 X 20 = 3,632,004,540
From the latest filing:
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
181,600,227 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
5%