11387918218 has 4 divisors (see below), whose sum is σ = 17081877330. Its totient is φ = 5693959108.

The previous prime is 11387918189. The next prime is 11387918221. The reversal of 11387918218 is 81281978311.

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., 9970621609 + 1417296609 = 99853^2 + 37647^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2846979553 + ... + 2846979556.

Almost surely, 2^11387918218 is an apocalyptic number.

11387918218 is a deficient number, since it is larger than the sum of its proper divisors (5693959112).

11387918218 is an equidigital number, since it uses as much as digits as its factorization.

11387918218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5693959111.

The product of its digits is 193536, while the sum is 49.

The spelling of 11387918218 in words is "eleven billion, three hundred eighty-seven million, nine hundred eighteen thousand, two hundred eighteen".