204243143430123 has 24 divisors (see below), whose sum is σ = 337163796684000. Its totient is φ = 116710190342784.

The previous prime is 204243143430089. The next prime is 204243143430143. The reversal of 204243143430123 is 321034341342402.

204243143430123 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 4 + 314 + 34 + 301 + 2 + 3 = 666.

It is not a de Polignac number, because 204243143430123 - 2¹³ = 204243143421931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204243143430143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47221303 + ... + 51364751.

It is an arithmetic number, because the mean of its divisors is an integer number (14048491528500).

Almost surely, 2^{204243143430123} is an apocalyptic number.

204243143430123 is a deficient number, since it is larger than the sum of its proper divisors (132920653253877).

204243143430123 is a wasteful number, since it uses less digits than its factorization.

204243143430123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4925891 (or 4925888 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 204243143430123 its reverse (321034341342402), we get a palindrome (525277484772525).

The spelling of 204243143430123 in words is "two hundred four trillion, two hundred forty-three billion, one hundred forty-three million, four hundred thirty thousand, one hundred twenty-three".