204131430123 has 32 divisors (see below), whose sum is σ = 286136716800. Its totient is φ = 129282967296.

The previous prime is 204131430023. The next prime is 204131430127. The reversal of 204131430123 is 321034131402.

It is a happy number.

It is not a de Polignac number, because 204131430123 - 2¹⁶ = 204131364587 is a prime.

It is a super-2 number, since 2×204131430123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204131430093 and 204131430102.

It is not an unprimeable number, because it can be changed into a prime (204131430127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16837858 + ... + 16849976.

It is an arithmetic number, because the mean of its divisors is an integer number (8941772400).

Almost surely, 2^204131430123 is an apocalyptic number.

204131430123 is a deficient number, since it is larger than the sum of its proper divisors (82005286677).

204131430123 is a wasteful number, since it uses less digits than its factorization.

204131430123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15731.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 204131430123 its reverse (321034131402), we get a palindrome (525165561525).

The spelling of 204131430123 in words is "two hundred four billion, one hundred thirty-one million, four hundred thirty thousand, one hundred twenty-three".