204181100 has 18 divisors (see below), whose sum is σ = 443073204. Its totient is φ = 81672400.

The previous prime is 204181057. The next prime is 204181111. The reversal of 204181100 is 1181402.

204181100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1020806 + ... + 1021005.

It is an arithmetic number, because the mean of its divisors is an integer number (24615178).

Almost surely, 2^204181100 is an apocalyptic number.

204181100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204181100 is an abundant number, since it is smaller than the sum of its proper divisors (238892104).

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

204181100 is a wasteful number, since it uses less digits than its factorization.

204181100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041825 (or 2041818 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 204181100 is about 14289.1952187658. The cubic root of 204181100 is about 588.8506784010.

The spelling of 204181100 in words is "two hundred four million, one hundred eighty-one thousand, one hundred".