204340322123 has 16 divisors (see below), whose sum is σ = 236619554304. Its totient is φ = 172843441920.

The previous prime is 204340322107. The next prime is 204340322141. The reversal of 204340322123 is 321223043402.

It is a cyclic number.

It is not a de Polignac number, because 204340322123 - 2⁴ = 204340322107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204340322092 and 204340322101.

It is not an unprimeable number, because it can be changed into a prime (204340322323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198023 + ... + 669248.

It is an arithmetic number, because the mean of its divisors is an integer number (14788722144).

Almost surely, 2^204340322123 is an apocalyptic number.

204340322123 is a deficient number, since it is larger than the sum of its proper divisors (32279232181).

204340322123 is an equidigital number, since it uses as much as digits as its factorization.

204340322123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867722.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 204340322123 its reverse (321223043402), we get a palindrome (525563365525).

The spelling of 204340322123 in words is "two hundred four billion, three hundred forty million, three hundred twenty-two thousand, one hundred twenty-three".