what is the similar expression for NaN in JS?

typeof NaN = "number", NaN is a number type, so is it a 64 floating point number in js like any other number?

feels that NaN is similar to 0

for the numerical type ~ ~ num, it will be converted to a 32-bit integer, and if the original value is also an integer not greater than 2 * 31, it will be the same

    let num = 0;
    ~num; // -1
    ~~num; // 0
    ~~num === num; // true
    //  NaN
    ~NaN; // -1
    ~~NaN; // 0
    ~~NaN === num

so NaN is a special 0, or 0 has two states?