204138365 has 8 divisors (see below), whose sum is σ = 245674080. Its totient is φ = 162838672.

The previous prime is 204138359. The next prime is 204138367. The reversal of 204138365 is 563831402.

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

It is a cyclic number.

It is not a de Polignac number, because 204138365 - 2¹⁰ = 204137341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204138367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57095 + ... + 60564.

It is an arithmetic number, because the mean of its divisors is an integer number (30709260).

Almost surely, 2^204138365 is an apocalyptic number.

It is an amenable number.

204138365 is a deficient number, since it is larger than the sum of its proper divisors (41535715).

204138365 is a wasteful number, since it uses less digits than its factorization.

204138365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118011.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 204138365 is about 14287.6997798806. The cubic root of 204138365 is about 588.8095934857.

Adding to 204138365 its reverse (563831402), we get a palindrome (767969767).

The spelling of 204138365 in words is "two hundred four million, one hundred thirty-eight thousand, three hundred sixty-five".