13087931718829 has 12 divisors (see below), whose sum is σ = 14388858812412. Its totient is φ = 11895679568960.

The previous prime is 13087931718781. The next prime is 13087931718833. The reversal of 13087931718829 is 92881713978031.

It can be written as a sum of positive squares in 2 ways, for example, as 8952524773929 + 4135406944900 = 2992077^2 + 2033570^2 .

It is not a de Polignac number, because 13087931718829 - 2⁹ = 13087931718317 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 (13087931718889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10499152 + ... + 11679385.

It is an arithmetic number, because the mean of its divisors is an integer number (1199071567701).

Almost surely, 2^{13087931718829} is an apocalyptic number.

It is an amenable number.

13087931718829 is a deficient number, since it is larger than the sum of its proper divisors (1300927093583).

13087931718829 is a wasteful number, since it uses less digits than its factorization.

13087931718829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22183436 (or 22183425 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 67.

The spelling of 13087931718829 in words is "thirteen trillion, eighty-seven billion, nine hundred thirty-one million, seven hundred eighteen thousand, eight hundred twenty-nine".