/**
 * Converts a numeric value to Finnish words.
 *
 * @param {number | string | bigint} value - The numeric value to convert
 * @returns {string} The number in Finnish words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {Error} If value is not a valid number format
 *
 * @example
 * toCardinal(21)       // 'kaksikymmentäyksi'
 * toCardinal(1000)     // 'tuhat'
 * toCardinal('3.14')   // 'kolme pilkku yksi neljä'
 */
export function toCardinal(value: number | string | bigint): string;
/**
 * Converts a numeric value to Finnish ordinal words.
 *
 * @param {number | string | bigint} value - The numeric value to convert (positive integer)
 * @returns {string} The number as ordinal words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {RangeError} If value is negative, zero, or has a decimal part
 *
 * @example
 * toOrdinal(1)    // 'ensimmäinen'
 * toOrdinal(2)    // 'toinen'
 * toOrdinal(3)    // 'kolmas'
 * toOrdinal(10)   // 'kymmenes'
 */
export function toOrdinal(value: number | string | bigint): string;
/**
 * Converts a numeric value to Finnish currency words (Euro).
 *
 * Euro uses sentti as subunit (100 senttiä = 1 euro).
 * Finnish has singular/plural: 1 euro vs 2 euroa, 1 sentti vs 2 senttiä.
 *
 * @param {number | string | bigint} value - The currency amount to convert
 * @returns {string} The amount in Finnish currency words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {Error} If value is not a valid number format
 *
 * @example
 * toCurrency(1)      // 'yksi euro'
 * toCurrency(42)     // 'neljäkymmentäkaksi euroa'
 * toCurrency(1.50)   // 'yksi euro viisikymmentä senttiä'
 */
export function toCurrency(value: number | string | bigint): string;