In the U.S, people are superstitious about the #13. Here’s a few from other countries
4: In China, the pronunciation of the word for the number four is similar to that of the Chinese word for death. Many buildings in China skip a fourth floor, just as U.S. builders sometimes omit floor 13.
9: Just as the number four has a bad-luck soundalike in Chinese, 9 is feared in Japan because it sounds similar to the Japanese word for torture or suffering.
17: Some Italians are superstitious about Friday the 17th because rearranging the Roman numeral XVII can create the word “VIXI”—translated from Latin to mean “my life is over.”