Thanks for your query.Based on the facts that you have posted it appears that you have problem of increased frequency of micturition.
The maximum count of urination in a day differs from person to person and from season to season and timing of the day,and water intake, but on an average it is from 4-6 times in a day. in a normal individual.
You have to go to pass urine 20 times in a day signifies that you have some illness may be Diabetes,Mellitus Diabetes Insipidus
or some Urological cause for increase frequency which need to be find out .
Please consult qualified General Physician or Urologist
for detail clinical assessment and further investigations and treatment .