Your Natural Number does not change. It seems to be defined while in utero. If you talk with mothers of multiple children, they will report that their babies behaved quite differently from each other while in the womb. Over time, the region associated with your Natural Number gets more developed and activated. In older people, that region stays developed even as other muscle groups atrophy. It remains the stabilization area in the body for you and those who share your Natural Number. Even people with poor balance can hold their posture of activation with surprising ease when it is activated.
You are born with a Natural Number and it is your superpower for your entire life!