205919419057 has 12 divisors (see below), whose sum is σ = 229985052624. Its totient is φ = 182845977720.

The previous prime is 205919419039. The next prime is 205919419081. The reversal of 205919419057 is 750914919502.

It is not a de Polignac number, because 205919419057 - 2²³ = 205911030449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205919418995 and 205919419013.

It is not an unprimeable number, because it can be changed into a prime (205919419157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5041843 + ... + 5082520.

It is an arithmetic number, because the mean of its divisors is an integer number (19165421052).

Almost surely, 2^205919419057 is an apocalyptic number.

It is an amenable number.

205919419057 is a deficient number, since it is larger than the sum of its proper divisors (24065633567).

205919419057 is a wasteful number, since it uses less digits than its factorization.

205919419057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10124460 (or 10124417 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 52.

The spelling of 205919419057 in words is "two hundred five billion, nine hundred nineteen million, four hundred nineteen thousand, fifty-seven".