20203123103 has 4 divisors (see below), whose sum is σ = 20479878288. Its totient is φ = 19926367920.

The previous prime is 20203123097. The next prime is 20203123123. The reversal of 20203123103 is 30132130202.

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 20203123103 - 2¹⁴ = 20203106719 is a prime.

It is a super-2 number, since 2×20203123103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203123123) 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, 138377483 + ... + 138377628.

It is an arithmetic number, because the mean of its divisors is an integer number (5119969572).

Almost surely, 2^20203123103 is an apocalyptic number.

20203123103 is a deficient number, since it is larger than the sum of its proper divisors (276755185).

20203123103 is an equidigital number, since it uses as much as digits as its factorization.

20203123103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276755184.

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

Adding to 20203123103 its reverse (30132130202), we get a palindrome (50335253305).

The spelling of 20203123103 in words is "twenty billion, two hundred three million, one hundred twenty-three thousand, one hundred three".