If you add a space in front of a number seed you will get a different result and in most cases better seeds that actual seed.
For an example, GameChap and bernie provided this seed.
If you simply add a space you willl find a cool Jungle and grass biome with some cool mines. If you are looking for a cool seed you can find even more seeds now. Hopefully, you dont know about this trick and I shared something useful to this forum.
If the seed is not a numerical value, it'll convert it to one based on the characters in the text. For instance,
Seed "0". It's a numerical value, so it will not be converted. (0)
Seed "potato". It's clearly not a numerical value, so it'll have to be converted to a hash. (-982438873)
Seed "-4274257526480157902" as you provided is a numerical value. It won't be converted. (-4274257526480157902)
Seed "-4274257526480157902 " has a space, which makes it not a numerical value, so it must be converted to a hash. (-1941764967)
If you add a space to a number, it is no longer a number. The world generator only works with numbers, not letters, so it must convert it to one. Changing any bit of a seed will give you a completely different seed, even if it's just adding a space.