Why does decimal.Parse work like this?

Question

C++ / C#

Good afternoon,
I get a number (type in base decimal(38,20)) in type string in c# service

var kk = decimal.Parse("884413000");
// kk == 884413000M // что за M?

Further overflow error on writing to the database of this value

Insertion into the database is carried out through the entity framework

var entity = new VendorsLogEntry();
entity.LastBalanceAmount = 884413000M;
db.VendorsLogEntry.Add(entity);
await db.SaveChangesAsync(); //OverflowException: Переполнение при преобразовании.

This column has type in base decimal(38,20)

AND in context:

modelBuilder.Entity<VendorsLogEntry>()
                .Property(e => e.LastBalanceAmount)
                .HasPrecision(38, 20);

Explain, please, what is wrong? Not such a big number

Answer 1

In general, I came across similar errors when reading data. I'm surprised such a crazy situation exists.
I decided that I changed the field type in the database to money, in the entity it was generated as decimal (19,4) and the error went away