20123123204430 has 96 divisors (see below), whose sum is σ = 52403129625600. Its totient is φ = 5357655366336.

The previous prime is 20123123204399. The next prime is 20123123204489. The reversal of 20123123204430 is 3440232132102.

20123123204430 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 3 + 1 + 23 + 204 + 430 = 666.

It is a super-2 number, since 2×20123123204430² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20123123204394 and 20123123204403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 364872117 + ... + 364927263.

It is an arithmetic number, because the mean of its divisors is an integer number (545865933600).

Almost surely, 2^{20123123204430} is an apocalyptic number.

20123123204430 is an abundant number, since it is smaller than the sum of its proper divisors (32280006421170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123123204430 is a wasteful number, since it uses less digits than its factorization.

20123123204430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61518 (or 61515 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 20123123204430 its reverse (3440232132102), we get a palindrome (23563355336532).

The spelling of 20123123204430 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-three million, two hundred four thousand, four hundred thirty".