20103203123 has 4 divisors (see below), whose sum is σ = 20155692288. Its totient is φ = 20050713960.

The previous prime is 20103203117. The next prime is 20103203227. The reversal of 20103203123 is 32130230102.

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 20103203123 - 2¹⁰ = 20103202099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20103203723) 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, 26244008 + ... + 26244773.

It is an arithmetic number, because the mean of its divisors is an integer number (5038923072).

Almost surely, 2^20103203123 is an apocalyptic number.

20103203123 is a deficient number, since it is larger than the sum of its proper divisors (52489165).

20103203123 is an equidigital number, since it uses as much as digits as its factorization.

20103203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52489164.

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

Adding to 20103203123 its reverse (32130230102), we get a palindrome (52233433225).

The spelling of 20103203123 in words is "twenty billion, one hundred three million, two hundred three thousand, one hundred twenty-three".