205854717212 has 24 divisors (see below), whose sum is σ = 361307740416. Its totient is φ = 102624060528.

The previous prime is 205854717199. The next prime is 205854717227. The reversal of 205854717212 is 212717458502.

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, 7977443 + ... + 8003205.

It is an arithmetic number, because the mean of its divisors is an integer number (15054489184).

Almost surely, 2^205854717212 is an apocalyptic number.

It is an amenable number.

205854717212 is a deficient number, since it is larger than the sum of its proper divisors (155453023204).

205854717212 is a wasteful number, since it uses less digits than its factorization.

205854717212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31577 (or 31575 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 44.

The spelling of 205854717212 in words is "two hundred five billion, eight hundred fifty-four million, seven hundred seventeen thousand, two hundred twelve".