Abstract: A solution for converting a cardinal number into a textual representation or into speech is presented. A converter converts, one by one, each digit of the cardinal number into a textual representation. A combiner adds a textual representation of a place value to a textual representation of a digit depending on a place of a digit. A corrector corrects, on the basis of language-dependent rules defining correct expressions, any formed textual representation relating to at least one digit having a textual representation different from a correct expression, and combines the textual representations for forming a full textual representation of the number. A synthesizer converts the full textual representation of the number into speech.