204321123402 has 64 divisors (see below), whose sum is σ = 452627288064. Its totient is φ = 60966829440.

The previous prime is 204321123401. The next prime is 204321123437.

It is a happy number.

204321123402 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (204321123401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13050343 + ... + 13065989.

It is an arithmetic number, because the mean of its divisors is an integer number (7072301376).

Almost surely, 2^204321123402 is an apocalyptic number.

204321123402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 204321123402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226313644032).

204321123402 is an abundant number, since it is smaller than the sum of its proper divisors (248306164662).

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

204321123402 is a wasteful number, since it uses less digits than its factorization.

204321123402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18683.

The product of its (nonzero) digits is 2304, while the sum is 24.

It can be divided in two parts, 204321 and 123402, that added together give a palindrome (327723).

The spelling of 204321123402 in words is "two hundred four billion, three hundred twenty-one million, one hundred twenty-three thousand, four hundred two".