20123130023 has 4 divisors (see below), whose sum is σ = 20666998440. Its totient is φ = 19579261608.

The previous prime is 20123130019. The next prime is 20123130043. The reversal of 20123130023 is 32003132102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20123130023 - 2² = 20123130019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123129983 and 20123130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123130043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271934153 + ... + 271934226.

It is an arithmetic number, because the mean of its divisors is an integer number (5166749610).

Almost surely, 2^20123130023 is an apocalyptic number.

20123130023 is a deficient number, since it is larger than the sum of its proper divisors (543868417).

20123130023 is an equidigital number, since it uses as much as digits as its factorization.

20123130023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543868416.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20123130023 its reverse (32003132102), we get a palindrome (52126262125).

The spelling of 20123130023 in words is "twenty billion, one hundred twenty-three million, one hundred thirty thousand, twenty-three".