Very large numbers are stringified in scientific notation

[cemremengu]

const BigNumber = require("bignumber.js")
console.log(BigNumber('5000310000187400001874').toString())

Expected: "5000310000187400001874" Actual: "5.000310000187400001874e+21"

https://runkit.com/cemremengu/5c10eb8866628400131646bc

[cemremengu]

My bad, needed to use toPrecision. Sorry for the noise.

[cemremengu]

Although docs seem to be incorrect for toPrecision

If sd is omitted, or is null or undefined, then the return value is the same as n.toString().

which is not the case

[MikeMcl]

To avoid scientific notation then either use toFixed() or change the value of EXPONENTIAL_AT:

const n = new BigNumber('5000310000187400001874');
console.log(n.toFixed());     //  "5000310000187400001874"
console.log(n.toString());    //  "5.000310000187400001874e+21"
BigNumber.set({EXPONENTIAL_AT: 25});
console.log(n.toString());    //  "5000310000187400001874"

There is no reason to use toPrecision without an argument, but in doing so you have discovered a mismatch between the documentation and behaviour. I will fix this presently. Thanks for the report.