205311954892 has 24 divisors (see below), whose sum is σ = 393416306640. Its totient is φ = 92976682560.

The previous prime is 205311954871. The next prime is 205311954893. The reversal of 205311954892 is 298459113502.

It is not an unprimeable number, because it can be changed into a prime (205311954893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8661363 + ... + 8685034.

It is an arithmetic number, because the mean of its divisors is an integer number (16392346110).

Almost surely, 2^205311954892 is an apocalyptic number.

205311954892 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

205311954892 is a deficient number, since it is larger than the sum of its proper divisors (188104351748).

205311954892 is a wasteful number, since it uses less digits than its factorization.

205311954892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17346681 (or 17346679 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 205311954892 in words is "two hundred five billion, three hundred eleven million, nine hundred fifty-four thousand, eight hundred ninety-two".