204406208600 has 96 divisors (see below), whose sum is σ = 518816793600. Its totient is φ = 74276726400.

The previous prime is 204406208527. The next prime is 204406208623. The reversal of 204406208600 is 6802604402.

It is a happy number.

It is a super-2 number, since 2×204406208600² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3133517 + ... + 3198083.

It is an arithmetic number, because the mean of its divisors is an integer number (5404341600).

Almost surely, 2^204406208600 is an apocalyptic number.

204406208600 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 204406208600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259408396800).

204406208600 is an abundant number, since it is smaller than the sum of its proper divisors (314410585000).

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

204406208600 is a wasteful number, since it uses less digits than its factorization.

204406208600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66033 (or 66024 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 204406208600 in words is "two hundred four billion, four hundred six million, two hundred eight thousand, six hundred".