204023522123 has 4 divisors (see below), whose sum is σ = 205930284120. Its totient is φ = 202116760128.

The previous prime is 204023522117. The next prime is 204023522149. The reversal of 204023522123 is 321225320402.

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 204023522123 - 2²⁶ = 203956413259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204023522092 and 204023522101.

It is not an unprimeable number, because it can be changed into a prime (204023522623) 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, 953380838 + ... + 953381051.

It is an arithmetic number, because the mean of its divisors is an integer number (51482571030).

Almost surely, 2^204023522123 is an apocalyptic number.

204023522123 is a deficient number, since it is larger than the sum of its proper divisors (1906761997).

204023522123 is a wasteful number, since it uses less digits than its factorization.

204023522123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906761996.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 204023522123 its reverse (321225320402), we get a palindrome (525248842525).

The spelling of 204023522123 in words is "two hundred four billion, twenty-three million, five hundred twenty-two thousand, one hundred twenty-three".