204040242012 has 12 divisors (see below), whose sum is σ = 476093898056. Its totient is φ = 68013414000.

The previous prime is 204040241983. The next prime is 204040242019. The reversal of 204040242012 is 210242040402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 204040242012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204040242019) 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, 8501676739 + ... + 8501676762.

Almost surely, 2^204040242012 is an apocalyptic number.

It is an amenable number.

204040242012 is an abundant number, since it is smaller than the sum of its proper divisors (272053656044).

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

204040242012 is a wasteful number, since it uses less digits than its factorization.

204040242012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17003353508 (or 17003353506 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 204040242012 its reverse (210242040402), we get a palindrome (414282282414).

The spelling of 204040242012 in words is "two hundred four billion, forty million, two hundred forty-two thousand, twelve".