20123130423 has 12 divisors (see below), whose sum is σ = 29491750904. Its totient is φ = 12195836400.

The previous prime is 20123130407. The next prime is 20123130437. The reversal of 20123130423 is 32403132102.

It is not a de Polignac number, because 20123130423 - 2⁴ = 20123130407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20123130423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123130493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27717448 + ... + 27718173.

Almost surely, 2^20123130423 is an apocalyptic number.

20123130423 is a deficient number, since it is larger than the sum of its proper divisors (9368620481).

20123130423 is a wasteful number, since it uses less digits than its factorization.

20123130423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55435646 (or 55435635 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20123130423 its reverse (32403132102), we get a palindrome (52526262525).

The spelling of 20123130423 in words is "twenty billion, one hundred twenty-three million, one hundred thirty thousand, four hundred twenty-three".