205433249988 has 48 divisors (see below), whose sum is σ = 499658765760. Its totient is φ = 65611728000.

The previous prime is 205433249941. The next prime is 205433250007. The reversal of 205433249988 is 889942334502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2207563 + ... + 2298738.

It is an arithmetic number, because the mean of its divisors is an integer number (10409557620).

Almost surely, 2^205433249988 is an apocalyptic number.

It is an amenable number.

205433249988 is an abundant number, since it is smaller than the sum of its proper divisors (294225515772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205433249988 is a wasteful number, since it uses less digits than its factorization.

205433249988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506468 (or 4506466 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 205433249988 in words is "two hundred five billion, four hundred thirty-three million, two hundred forty-nine thousand, nine hundred eighty-eight".