205931853740 has 24 divisors (see below), whose sum is σ = 443004623712. Its totient is φ = 80363649920.

The previous prime is 205931853739. The next prime is 205931853847. The reversal of 205931853740 is 47358139502.

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, 125567384 + ... + 125569023.

It is an arithmetic number, because the mean of its divisors is an integer number (18458525988).

Almost surely, 2^205931853740 is an apocalyptic number.

205931853740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205931853740 is an abundant number, since it is smaller than the sum of its proper divisors (237072769972).

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

205931853740 is a wasteful number, since it uses less digits than its factorization.

205931853740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251136457 (or 251136455 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 205931853740 in words is "two hundred five billion, nine hundred thirty-one million, eight hundred fifty-three thousand, seven hundred forty".