13513544423 has 4 divisors (see below), whose sum is σ = 13542731808. Its totient is φ = 13484357040.

The previous prime is 13513544413. The next prime is 13513544437. The reversal of 13513544423 is 32444531531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32444531531 = 88069 ⋅368399.

It is a cyclic number.

It is not a de Polignac number, because 13513544423 - 2²⁰ = 13512495847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13513544413) 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, 14592998 + ... + 14593923.

It is an arithmetic number, because the mean of its divisors is an integer number (3385682952).

Almost surely, 2^13513544423 is an apocalyptic number.

13513544423 is a deficient number, since it is larger than the sum of its proper divisors (29187385).

13513544423 is an equidigital number, since it uses as much as digits as its factorization.

13513544423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29187384.

The product of its digits is 86400, while the sum is 35.

The spelling of 13513544423 in words is "thirteen billion, five hundred thirteen million, five hundred forty-four thousand, four hundred twenty-three".