Die 921805 is het Automaatnummer.

https://community.openstreetmap.org/t/geldautomaten-van-banken-naar-geldmaat-veranderen/126733/55

Die staan ook in de json data voor de locatie:

location/2719001
1:{"data":{"city":"Zoetermeer","id":"2719001","devices":[{"depositStatus":false,"deviceState":"Unavailable","audioGuidance":true,"city":"Zoetermeer","functionality":"Geldautomaat","geldmaatPlus":false,"id":"921805","latitude":52.043494,"location":"2719001","longitude":4.476275,"openingHours":{"tu":["07:00-22:00"],"mo":["07:00-22:00"],"su":["08:00-22:00"],"th":["07:00-22:00"],"fr":["07:00-22:00"],"we":["07:00-22:00"],"sa":["07:00-22:00"]},"storeType":"albertheijn","streetAddress":"Samanthagang 64","withdrawableDenominations":["none"],"zip":"2719CK"}],"functionality":["Geldautomaat"],"latitude":52.043494,"longitude":4.476275,"streetAddress":"Samanthagang 64","storeType":"albertheijn","zip":"2719CK"}}

Het locatie nummer is trouwens de postcode met een volgnummer