20023030123 has 4 divisors (see below), whose sum is σ = 20221278048. Its totient is φ = 19824782200.

The previous prime is 20023030073. The next prime is 20023030147. The reversal of 20023030123 is 32103032002.

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 20023030123 - 2¹⁷ = 20022899051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20023030097 and 20023030106.

It is not an unprimeable number, because it can be changed into a prime (20023031123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99123811 + ... + 99124012.

It is an arithmetic number, because the mean of its divisors is an integer number (5055319512).

Almost surely, 2^20023030123 is an apocalyptic number.

20023030123 is a deficient number, since it is larger than the sum of its proper divisors (198247925).

20023030123 is a wasteful number, since it uses less digits than its factorization.

20023030123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198247924.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 20023030123 its reverse (32103032002), we get a palindrome (52126062125).

The spelling of 20023030123 in words is "twenty billion, twenty-three million, thirty thousand, one hundred twenty-three".