Nov 3 (Reuters) - The Slovak central bank's foreign currency reserves edged up to $13.147 billion in the week to Oct. 31, from $13.021 billion one week earlier, the bank said on Friday. SLOVAK FOREIGN RESERVES OCT 31 OCT 25 OCT 18 ($ million) Central Bank 13,147.0 13,021.2 13,061.5 Commercial banks 2,539.8 2,461.5 2,321.4 Total banking sector 15,686.8 15,482.7 15,382.9 NOTE: Reserves data are calculated according to methodology compatible with European Central Bank standards. (Reporting by Martin Santa in Bratislava) ((Editing by Gerrard Raven; editorial@reuters.sk; Reuters Messaging: martin.santa.reuters.com@reuters.net; +421 2 5341 8402)) Keywords: MARKETS SLOVAKIA RESERVES