Concept: thirty
Label (en): 30
Description (en): natural number
Also known as (en): thirty, number 30
Label (es): 30
Description (es): número natural
Also known as (es): treinta, trigésimo, trigesimo
Label (ca): trenta
Description (ca): nombre
Label (it): 30
Instance of: positive integer, abundant number, sphenic number, harshad number, Giuga number, square pyramidal number, even number, pronic number, hendecagonal number, composite number