13081239874 has 8 divisors (see below), whose sum is σ = 19672302780. Its totient is φ = 6523805616.

The previous prime is 13081239863. The next prime is 13081239889. The reversal of 13081239874 is 47893218031.

It can be written as a sum of positive squares in 2 ways, for example, as 13077066025 + 4173849 = 114355^2 + 2043^2 .

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

It is a super-2 number, since 2×13081239874² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8406189 + ... + 8407744.

Almost surely, 2^13081239874 is an apocalyptic number.

13081239874 is a deficient number, since it is larger than the sum of its proper divisors (6591062906).

13081239874 is a wasteful number, since it uses less digits than its factorization.

13081239874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16814324.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 13081239874 in words is "thirteen billion, eighty-one million, two hundred thirty-nine thousand, eight hundred seventy-four".