204104202031 has 4 divisors (see below), whose sum is σ = 204107982232. Its totient is φ = 204100421832.

The previous prime is 204104202013. The next prime is 204104202047. The reversal of 204104202031 is 130202401402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204104202031 - 2¹¹ = 204104199983 is a prime.

It is a super-2 number, since 2×204104202031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204104202011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1807920 + ... + 1917493.

It is an arithmetic number, because the mean of its divisors is an integer number (51026995558).

Almost surely, 2^204104202031 is an apocalyptic number.

204104202031 is a deficient number, since it is larger than the sum of its proper divisors (3780201).

204104202031 is an equidigital number, since it uses as much as digits as its factorization.

204104202031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780200.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 204104202031 its reverse (130202401402), we get a palindrome (334306603433).

The spelling of 204104202031 in words is "two hundred four billion, one hundred four million, two hundred two thousand, thirty-one".