13318711987 has 8 divisors (see below), whose sum is σ = 15231974400. Its totient is φ = 11408096904.

The previous prime is 13318711969. The next prime is 13318712023. The reversal of 13318711987 is 78911781331.

It is a happy number.

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 13318711987 - 2⁷ = 13318711859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13318711987.

It is not an unprimeable number, because it can be changed into a prime (13318711787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651037 + ... + 671182.

It is an arithmetic number, because the mean of its divisors is an integer number (1903996800).

Almost surely, 2^13318711987 is an apocalyptic number.

13318711987 is a deficient number, since it is larger than the sum of its proper divisors (1913262413).

13318711987 is a wasteful number, since it uses less digits than its factorization.

13318711987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323665.

The product of its digits is 254016, while the sum is 49.

The spelling of 13318711987 in words is "thirteen billion, three hundred eighteen million, seven hundred eleven thousand, nine hundred eighty-seven".