204639054 has 8 divisors (see below), whose sum is σ = 409278120. Its totient is φ = 68213016.

The previous prime is 204639049. The next prime is 204639089. The reversal of 204639054 is 450936402.

It is a sphenic number, since it is the product of 3 distinct primes.

204639054 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

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, 17053249 + ... + 17053260.

It is an arithmetic number, because the mean of its divisors is an integer number (51159765).

Almost surely, 2^204639054 is an apocalyptic number.

204639054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

204639054 is a wasteful number, since it uses less digits than its factorization.

204639054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34106514.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 204639054 is about 14305.2107289617. The cubic root of 204639054 is about 589.2905904274.

The spelling of 204639054 in words is "two hundred four million, six hundred thirty-nine thousand, fifty-four".