عِنْدِي عِشْرُونَ دِرْهَمًا
Translation: I have twenty dirhams.
عِنْدَ: adverb of location attached to an understood fronted predicate; in an iḍāfa.
ي: attached first-person pronoun, genitive as muḍāf ilayh.
عِشْرُونَ: postponed nominative subject, with wāw as the sign in a decades numeral.
دِرْهَمًا: indefinite accusative tamyīz specifying the counted item.
Dirhaman is not a direct object: the construction contains no transitive verb; it specifies the number.