20503463123 has 12 divisors (see below), whose sum is σ = 24220338408. Its totient is φ = 17205701760.

The previous prime is 20503463117. The next prime is 20503463171. The reversal of 20503463123 is 32136430502.

It is not a de Polignac number, because 20503463123 - 2³⁰ = 19429721299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20503463423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5512790 + ... + 5516507.

It is an arithmetic number, because the mean of its divisors is an integer number (2018361534).

Almost surely, 2^20503463123 is an apocalyptic number.

20503463123 is a deficient number, since it is larger than the sum of its proper divisors (3716875285).

20503463123 is a wasteful number, since it uses less digits than its factorization.

20503463123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11029334 (or 11029321 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 20503463123 its reverse (32136430502), we get a palindrome (52639893625).

The spelling of 20503463123 in words is "twenty billion, five hundred three million, four hundred sixty-three thousand, one hundred twenty-three".