1-The patch needs opatch utility version 220.127.116.11.0 or later to apply this patch. Oracle recommends that you use the latest released OPatch 11.2, which is available for download from My Oracle Support patch 6880880 by selecting the 18.104.22.168.0 release.
For information about OPatch documentation, including any known issues, see My Oracle Support Note 293369.1 OPatch documentation list.
After downloading the Opatch expand it using unzip utility and move the Opatch directory inside the database home to Opatch.original.now copy the folder you expanded to the oracle home drectory.
The patch 13923374 is for stand alone database only.
download the patch from metalink and unzip the patch using unzip utility. it should create a folder named 13923374 as shown below:
To apply the patch to stand alone database with no grid infrastructure make sure to shutdown the lisener and the database and follow below steps to apply PSU to the database: