20003123203 has 4 divisors (see below), whose sum is σ = 22860712240. Its totient is φ = 17145534168.

The previous prime is 20003123197. The next prime is 20003123213. The reversal of 20003123203 is 30232130002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30232130002 = 2 ⋅15116065001.

It is not a de Polignac number, because 20003123203 - 2⁹ = 20003122691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003123213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428794508 + ... + 1428794521.

It is an arithmetic number, because the mean of its divisors is an integer number (5715178060).

Almost surely, 2^20003123203 is an apocalyptic number.

20003123203 is a deficient number, since it is larger than the sum of its proper divisors (2857589037).

20003123203 is an equidigital number, since it uses as much as digits as its factorization.

20003123203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857589036.

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

Adding to 20003123203 its reverse (30232130002), we get a palindrome (50235253205).

The spelling of 20003123203 in words is "twenty billion, three million, one hundred twenty-three thousand, two hundred three".