13409108842 has 4 divisors (see below), whose sum is σ = 20113663266. Its totient is φ = 6704554420.

The previous prime is 13409108837. The next prime is 13409108857. The reversal of 13409108842 is 24880190431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7913703681 + 5495405161 = 88959^2 + 74131^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13409108795 and 13409108804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3352277209 + ... + 3352277212.

Almost surely, 2^13409108842 is an apocalyptic number.

13409108842 is a deficient number, since it is larger than the sum of its proper divisors (6704554424).

13409108842 is an equidigital number, since it uses as much as digits as its factorization.

13409108842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704554423.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 13409108842 in words is "thirteen billion, four hundred nine million, one hundred eight thousand, eight hundred forty-two".