CREATE TABLE table_2562572_54 (population__2011_ NUMBER, settlement VARCHAR2)

What is the lowest population in 2011 for the settlement of ortanovci?
SELECT MIN(population__2011_) FROM table_2562572_54 WHERE settlement = "Čortanovci"
SELECT MIN("population__2011_") FROM "table_2562572_54" WHERE "settlement" = "Čortanovci"