13520111405 has 8 divisors (see below), whose sum is σ = 16233223392. Its totient is φ = 10810029328.

The previous prime is 13520111399. The next prime is 13520111443. The reversal of 13520111405 is 50411102531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13520111405 - 2²⁰ = 13519062829 is a prime.

It is a super-2 number, since 2×13520111405² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747647 + ... + 765516.

It is an arithmetic number, because the mean of its divisors is an integer number (2029152924).

Almost surely, 2^13520111405 is an apocalyptic number.

It is an amenable number.

13520111405 is a deficient number, since it is larger than the sum of its proper divisors (2713111987).

13520111405 is a wasteful number, since it uses less digits than its factorization.

13520111405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514955.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 13520111405 its reverse (50411102531), we get a palindrome (63931213936).

The spelling of 13520111405 in words is "thirteen billion, five hundred twenty million, one hundred eleven thousand, four hundred five".