204104093890 has 16 divisors (see below), whose sum is σ = 388998391032. Its totient is φ = 76839188224.

The previous prime is 204104093881. The next prime is 204104093911. The reversal of 204104093890 is 98390401402.

It can be written as a sum of positive squares in 4 ways, for example, as 161764035601 + 42340058289 = 402199^2 + 205767^2 .

It is a super-2 number, since 2×204104093890² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600305989 + ... + 600306328.

Almost surely, 2^204104093890 is an apocalyptic number.

204104093890 is a deficient number, since it is larger than the sum of its proper divisors (184894297142).

204104093890 is a wasteful number, since it uses less digits than its factorization.

204104093890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200612341.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 204104093890 in words is "two hundred four billion, one hundred four million, ninety-three thousand, eight hundred ninety".