205732823009 has 12 divisors (see below), whose sum is σ = 240574860288. Its totient is φ = 175419153000.

The previous prime is 205732822991. The next prime is 205732823041. The reversal of 205732823009 is 900328237502.

It is a de Polignac number, because none of the positive numbers 2^k-205732823009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205782823009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10981817 + ... + 11000534.

It is an arithmetic number, because the mean of its divisors is an integer number (20047905024).

Almost surely, 2^205732823009 is an apocalyptic number.

It is an amenable number.

205732823009 is a deficient number, since it is larger than the sum of its proper divisors (34842037279).

205732823009 is a wasteful number, since it uses less digits than its factorization.

205732823009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21982556 (or 21982549 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 205732823009 in words is "two hundred five billion, seven hundred thirty-two million, eight hundred twenty-three thousand, nine".