Number-theoretical refers to anything related to the study of numbers and their properties. Synonyms for this term include arithmetic, numerical, mathematical, computational, algorithmic, and quantitative. These terms emphasize the mathematical aspect of the study of numbers. Other synonyms include cryptographic, algebraic, and geometric, which highlight the particular approaches used in studying numbers. Overall, the synonyms for number-theoretical emphasize the rigorous and analytical nature of the discipline, which has applications in various fields, including computer science, economics, engineering, and physics. Understanding the synonyms for number-theoretical helps to appreciate the breadth and diversity of the subject matter in this field.