204321104 has 80 divisors (see below), whose sum is σ = 443304960. Its totient is φ = 90616320.

The previous prime is 204321077. The next prime is 204321109. The reversal of 204321104 is 401123402.

It is a super-2 number, since 2×204321104² = 83494227079557632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204321109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1069649 + ... + 1069839.

It is an arithmetic number, because the mean of its divisors is an integer number (5541312).

Almost surely, 2^204321104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204321104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221652480).

204321104 is an abundant number, since it is smaller than the sum of its proper divisors (238983856).

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

204321104 is a wasteful number, since it uses less digits than its factorization.

204321104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 204321104 is about 14294.0933255663. The cubic root of 204321104 is about 588.9852364226.

Adding to 204321104 its reverse (401123402), we get a palindrome (605444506).

The spelling of 204321104 in words is "two hundred four million, three hundred twenty-one thousand, one hundred four".