13187218963 has 4 divisors (see below), whose sum is σ = 13216075480. Its totient is φ = 13158362448.

The previous prime is 13187218949. The next prime is 13187219041. The reversal of 13187218963 is 36981278131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13187218963 - 2⁵ = 13187218931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13182218963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14427573 + ... + 14428486.

It is an arithmetic number, because the mean of its divisors is an integer number (3304018870).

Almost surely, 2^13187218963 is an apocalyptic number.

13187218963 is a deficient number, since it is larger than the sum of its proper divisors (28856517).

13187218963 is an equidigital number, since it uses as much as digits as its factorization.

13187218963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28856516.

The product of its digits is 435456, while the sum is 49.

The spelling of 13187218963 in words is "thirteen billion, one hundred eighty-seven million, two hundred eighteen thousand, nine hundred sixty-three".