13013523421 has 4 divisors (see below), whose sum is σ = 13093361152. Its totient is φ = 12933685692.

The previous prime is 13013523373. The next prime is 13013523527. The reversal of 13013523421 is 12432531031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12432531031 = 97 ⋅128170423.

It is a cyclic number.

It is not a de Polignac number, because 13013523421 - 2¹¹ = 13013521373 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 (13013524421) 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, 39918621 + ... + 39918946.

It is an arithmetic number, because the mean of its divisors is an integer number (3273340288).

Almost surely, 2^13013523421 is an apocalyptic number.

It is an amenable number.

13013523421 is a deficient number, since it is larger than the sum of its proper divisors (79837731).

13013523421 is an equidigital number, since it uses as much as digits as its factorization.

13013523421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79837730.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 13013523421 in words is "thirteen billion, thirteen million, five hundred twenty-three thousand, four hundred twenty-one".