204131436 has 12 divisors (see below), whose sum is σ = 476306712. Its totient is φ = 68043808.

The previous prime is 204131429. The next prime is 204131467. The reversal of 204131436 is 634131402.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8505465 + ... + 8505488.

It is an arithmetic number, because the mean of its divisors is an integer number (39692226).

Almost surely, 2^204131436 is an apocalyptic number.

It is an amenable number.

204131436 is an abundant number, since it is smaller than the sum of its proper divisors (272175276).

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

204131436 is a wasteful number, since it uses less digits than its factorization.

204131436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17010960 (or 17010958 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 204131436 is about 14287.4572965241. The cubic root of 204131436 is about 588.8029314882.

Adding to 204131436 its reverse (634131402), we get a palindrome (838262838).

The spelling of 204131436 in words is "two hundred four million, one hundred thirty-one thousand, four hundred thirty-six".