205811731096 has 16 divisors (see below), whose sum is σ = 391332165840. Its totient is φ = 101456486880.

The previous prime is 205811731093. The next prime is 205811731109. The reversal of 205811731096 is 690137118502.

It is a super-2 number, since 2×205811731096² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205811731093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181171731 + ... + 181172866.

It is an arithmetic number, because the mean of its divisors is an integer number (24458260365).

Almost surely, 2^205811731096 is an apocalyptic number.

It is an amenable number.

205811731096 is a deficient number, since it is larger than the sum of its proper divisors (185520434744).

205811731096 is a wasteful number, since it uses less digits than its factorization.

205811731096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362344674 (or 362344670 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

Adding to 205811731096 its reverse (690137118502), we get a palindrome (895948849598).

The spelling of 205811731096 in words is "two hundred five billion, eight hundred eleven million, seven hundred thirty-one thousand, ninety-six".