204220520504 has 128 divisors (see below), whose sum is σ = 523823086080. Its totient is φ = 72060019200.

The previous prime is 204220520467. The next prime is 204220520519. The reversal of 204220520504 is 405025022402.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183839 + ... + 665009.

It is an arithmetic number, because the mean of its divisors is an integer number (4092367860).

Almost surely, 2^204220520504 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 204220520504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261911543040).

204220520504 is an abundant number, since it is smaller than the sum of its proper divisors (319602565576).

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

204220520504 is a wasteful number, since it uses less digits than its factorization.

204220520504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481261 (or 481257 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

Adding to 204220520504 its reverse (405025022402), we get a palindrome (609245542906).

The spelling of 204220520504 in words is "two hundred four billion, two hundred twenty million, five hundred twenty thousand, five hundred four".