13013123403 has 12 divisors (see below), whose sum is σ = 20183620200. Its totient is φ = 7436070432.

The previous prime is 13013123371. The next prime is 13013123413. The reversal of 13013123403 is 30432131031.

It is not a de Polignac number, because 13013123403 - 2⁵ = 13013123371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 13013123403.

It is not an unprimeable number, because it can be changed into a prime (13013123413) 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, 44262178 + ... + 44262471.

It is an arithmetic number, because the mean of its divisors is an integer number (1681968350).

Almost surely, 2^13013123403 is an apocalyptic number.

13013123403 is a deficient number, since it is larger than the sum of its proper divisors (7170496797).

13013123403 is an equidigital number, since it uses as much as digits as its factorization.

13013123403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88524666 (or 88524659 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 13013123403 its reverse (30432131031), we get a palindrome (43445254434).

The spelling of 13013123403 in words is "thirteen billion, thirteen million, one hundred twenty-three thousand, four hundred three".