I would like to change a distance unit on Euclidean distance analysis. How can i change the current unit to feet or meter?
what unit is the unit for 0 and 0.18939. is it degree?
Yes, it's degrees, because your raster is in geographic coordinates. Project the input data, either the raster or the features that made it, to a suitable projected coordinate system (units feet or metres) then rerun your Euclidean Distance and your units should be in the same units as the features.
The environment output coordinate system has an effect on the created raster and should force the results in the units of this environment if set, but either way by projecting or setting the environment it would be best to recreate the Euclidean Distance rather than trying to project the existing raster as resampling will warp the distances and they will no longer be reliable.