204434210123 has 8 divisors (see below), whose sum is σ = 240174456816. Its totient is φ = 171553183200.

The previous prime is 204434210117. The next prime is 204434210153. The reversal of 204434210123 is 321012434402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204434210123 - 2¹⁰ = 204434209099 is a prime.

It is a super-2 number, since 2×204434210123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204434210092 and 204434210101.

It is not an unprimeable number, because it can be changed into a prime (204434210153) 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 7 ways as a sum of consecutive naturals, for example, 714804788 + ... + 714805073.

It is an arithmetic number, because the mean of its divisors is an integer number (30021807102).

Almost surely, 2^204434210123 is an apocalyptic number.

204434210123 is a deficient number, since it is larger than the sum of its proper divisors (35740246693).

204434210123 is a wasteful number, since it uses less digits than its factorization.

204434210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429609885.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 204434210123 its reverse (321012434402), we get a palindrome (525446644525).

The spelling of 204434210123 in words is "two hundred four billion, four hundred thirty-four million, two hundred ten thousand, one hundred twenty-three".