204121332 has 72 divisors (see below), whose sum is σ = 548402400. Its totient is φ = 63834048.

The previous prime is 204121331. The next prime is 204121339. The reversal of 204121332 is 233121402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204121331) 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 23 ways as a sum of consecutive naturals, for example, 71794 + ... + 74582.

It is an arithmetic number, because the mean of its divisors is an integer number (7616700).

Almost surely, 2^204121332 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 204121332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274201200).

204121332 is an abundant number, since it is smaller than the sum of its proper divisors (344281068).

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

204121332 is a wasteful number, since it uses less digits than its factorization.

204121332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925 (or 2920 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 204121332 is about 14287.1036952911. The cubic root of 204121332 is about 588.7932165661.

Adding to 204121332 its reverse (233121402), we get a palindrome (437242734).

The spelling of 204121332 in words is "two hundred four million, one hundred twenty-one thousand, three hundred thirty-two".