To reproduce:
1. Make sure you have Android SDK Platform tools version of 29.0.0 (replace C:\Users\<user>\AppData\Local\Android\Sdk\platform-tools with attached platform tools package)
2. Open attached project "TestQuest.zip"
3. In Unity, Project window, TestEditor.cs script, line 23, change "deviceId" value to your connected mobile device's serial number
4. Build and Run on Android (Building works as intended)

Expected: application is built to a device of your choice
Actual: editor throws errors "FormatException: Input string was not in a correct format." due to UnityEditor.Android.AndroidDevice.Properties not handling invalid values

Reproduced in: 2017.4.30f1, 2018.4.4f1, 2019.1.10f1, 2019.2.0b9, 2019.3.0a9

Reproduced with Android SDK Platform tools: 29.0.0
Not reproduced with Android SDK Platform tools: 29.0.1

Note: full error:
FormatException: Input string was not in a correct format.
System.Number.StringToNumber (System.String str, System.Globalization.NumberStyles options, System.Number+NumberBuffer& number, System.Globalization.NumberFormatInfo info, System.Boolean parseDecimal) (at <7d97106330684add86d080ecf65bfe69>:0)
System.Number.ParseInt32 (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) (at <7d97106330684add86d080ecf65bfe69>:0)
System.Int32.Parse (System.String s, System.IFormatProvider provider) (at <7d97106330684add86d080ecf65bfe69>:0)
System.Convert.ToInt32 (System.String value) (at <7d97106330684add86d080ecf65bfe69>:0)
UnityEditor.Android.AndroidDeviceInfo.get_SDKVersion () (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.AndroidDeviceInfo.HasSDKSupport (System.Int32 minimumVersion) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.AndroidDeploymentTargetsExtension+AndroidDeploymentTargetInfo.CheckTargetInternal (UnityEditor.Android.AndroidDeploymentTargetRequirements targetRequirements) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.AndroidDeploymentTargetsExtension+AndroidDeploymentTargetInfo.CheckTarget (UnityEditor.DeploymentTargetRequirements targetRequirements) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.PostProcessor.Tasks.CheckDevice.FindCompatibleDevices (UnityEditor.Android.AndroidDeploymentTargetRequirements targetRequirements, UnityEditor.DeploymentTargets.DeploymentTargetId targetId, System.Collections.Generic.List`1[T] knownDevices, System.Collections.Generic.List`1[UnityEditor.Android.PostProcessor.Tasks.CheckDevice+DeviceInfo]& compatibleDevices) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.PostProcessor.Tasks.CheckDevice.GetTargetDevices (UnityEditor.Android.ADB adb) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.PostProcessor.Tasks.CheckDevice.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.PostProcessAndroidPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.Android.AndroidBuildPostprocessor.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) (at <1a10f9035b6b403994c99e5b653643c6>:0)
UnityEditor.PostprocessBuildPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:106)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)