205396193620 has 24 divisors (see below), whose sum is σ = 454033692000. Its totient is φ = 77834346912.

The previous prime is 205396193567. The next prime is 205396193633. The reversal of 205396193620 is 26391693502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270257770 + ... + 270258529.

It is an arithmetic number, because the mean of its divisors is an integer number (18918070500).

Almost surely, 2^205396193620 is an apocalyptic number.

205396193620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205396193620 is an abundant number, since it is smaller than the sum of its proper divisors (248637498380).

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

205396193620 is a wasteful number, since it uses less digits than its factorization.

205396193620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540516327 (or 540516325 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 46.

The spelling of 205396193620 in words is "two hundred five billion, three hundred ninety-six million, one hundred ninety-three thousand, six hundred twenty".