/**
 * Converts a numeric value to German words.
 *
 * This is the main public API. It accepts any valid numeric input
 * (number, string, or bigint) and handles parsing internally.
 *
 * @param {number | string | bigint} value - The numeric value to convert
 * @returns {string} The number in German words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {Error} If value is not a valid number format
 *
 * @example
 * toCardinal(21)           // 'einundzwanzig'
 * toCardinal(1000)         // 'eintausend'
 * toCardinal(1000000)      // 'eine Million'
 */
export function toCardinal(value: number | string | bigint): string;
/**
 * Converts a numeric value to German ordinal words.
 *
 * German ordinals add -te for 1-19 and -ste for 20+.
 * Irregular forms: erste (1st), dritte (3rd), siebte (7th), achte (8th).
 *
 * @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)    // 'erste'
 * toOrdinal(2)    // 'zweite'
 * toOrdinal(3)    // 'dritte'
 * toOrdinal(21)   // 'einundzwanzigste'
 * toOrdinal(100)  // 'einhundertste'
 * toOrdinal(1000) // 'eintausendste'
 */
export function toOrdinal(value: number | string | bigint): string;
/**
 * Converts a numeric value to German currency words (Euro).
 *
 * @param {number | string | bigint} value - The currency amount to convert
 * @param {Object} [options] - Optional configuration
 * @param {boolean} [options.and=true] - Use "und" between euros and cents
 * @returns {string} The amount in German currency words
 * @throws {TypeError} If value is not a valid numeric type
 * @throws {Error} If value is not a valid number format
 *
 * @example
 * toCurrency(42.50)                 // 'zweiundvierzig Euro und fünfzig Cent'
 * toCurrency(1)                     // 'ein Euro'
 * toCurrency(0.99)                  // 'neunundneunzig Cent'
 * toCurrency(0.01)                  // 'ein Cent'
 * toCurrency(42.50, { and: false }) // 'zweiundvierzig Euro fünfzig Cent'
 */
export function toCurrency(value: number | string | bigint, options?: {
    and?: boolean | undefined;
}): string;