CREATE TABLE table_62518 ("Constituency number" TEXT, "Name" TEXT, "Reserved for  (  SC / ST /None ) " TEXT, "District" TEXT, "Number of electorates  ( 2009 ) " FLOAT)

Amritpur has what constituency number?
SELECT "Constituency number" FROM table_62518 WHERE "Name" = 'amritpur'
SELECT "Constituency number" FROM "table_62518" WHERE "Name" = 'amritpur'