204105642012 has 36 divisors (see below), whose sum is σ = 546282749376. Its totient is φ = 64033142400.

The previous prime is 204105642007. The next prime is 204105642017. The reversal of 204105642012 is 210246501402.

204105642012 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 0 + 5 + 642 + 0 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (204105642007) and next prime (204105642017).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×204105642012² (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 (204105642017) 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, 166752364 + ... + 166753587.

It is an arithmetic number, because the mean of its divisors is an integer number (15174520816).

Almost surely, 2^204105642012 is an apocalyptic number.

It is an amenable number.

204105642012 is an abundant number, since it is smaller than the sum of its proper divisors (342177107364).

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

204105642012 is a wasteful number, since it uses less digits than its factorization.

204105642012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333505978 (or 333505973 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 204105642012 in words is "two hundred four billion, one hundred five million, six hundred forty-two thousand, twelve".