204055211500 has 96 divisors (see below), whose sum is σ = 509471778816. Its totient is φ = 69941188800.

The previous prime is 204055211483. The next prime is 204055211509. The reversal of 204055211500 is 5112550402.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (204055211509) 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, 16314249 + ... + 16326751.

It is an arithmetic number, because the mean of its divisors is an integer number (5306997696).

Almost surely, 2^204055211500 is an apocalyptic number.

204055211500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204055211500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254735889408).

204055211500 is an abundant number, since it is smaller than the sum of its proper divisors (305416567316).

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

204055211500 is a wasteful number, since it uses less digits than its factorization.

204055211500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17192 (or 17180 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 204055211500 its reverse (5112550402), we get a palindrome (209167761902).

The spelling of 204055211500 in words is "two hundred four billion, fifty-five million, two hundred eleven thousand, five hundred".