IsNum, Num and Num# fail to recognize a big number with at least 15 digit

[Carlo_Romagnano]

With 15 or more digits IsNum('000000000425510') returns false, with 14 digit IsNum('00000000425510') returns true.

It's a bug?

Here my temporary solution:
IsNum(replace(ltrim(replace('000000000425510','0',' ')),' ','0'))

Is there a better solution?

[Or · Accepted solution]

Not a bug. That's the number of digits Qlik allows.

There's a request to increase it:

https://community.qlik.com/t5/Suggest-an-Idea/Numeric-fields-on-Qlik-Sense-must-accept-more-than-14-...