If a person D.O.B. is 19-09-1986

Then his Destiny No. will be 1+9 = 1
and Life Path Number will be 1+9+0+9+1+9+8+6 = 7

you have to add all the number.the sum of that number must be harmony with DOB.because numerology is about adding...adding until you get 1 single digit.to check it please go to
http://www.gonumerology.com/q/numerology-phone-number/
total add harmony with

for easy calculation please used your dob.for example 0181991986
018 is operator code and the rest is your but still you have to add all.
0+1+8+1+9+9+1+9+8+6=52
5+2=7

1-you get a very good cell number to carry/communication its your DOB.CANNOT BE Change or altered.

2-you get the same path number.if your path number is not the same this particular number is harmony to each other
1-5-7
2-4-8
3-6-9

hope can given your some light...