204136542 has 12 divisors (see below), whose sum is σ = 442295880. Its totient is φ = 68045508.

The previous prime is 204136489. The next prime is 204136547. The reversal of 204136542 is 245631402.

204136542 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 3 + 654 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204136547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5670442 + ... + 5670477.

It is an arithmetic number, because the mean of its divisors is an integer number (36857990).

Almost surely, 2^204136542 is an apocalyptic number.

204136542 is an abundant number, since it is smaller than the sum of its proper divisors (238159338).

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

204136542 is a wasteful number, since it uses less digits than its factorization.

204136542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11340927 (or 11340924 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 204136542 is about 14287.6359836048. The cubic root of 204136542 is about 588.8078407479.

Adding to 204136542 its reverse (245631402), we get a palindrome (449767944).

It can be divided in two parts, 2041 and 36542, that added together give a palindrome (38583).

The spelling of 204136542 in words is "two hundred four million, one hundred thirty-six thousand, five hundred forty-two".