11918390786 has 4 divisors (see below), whose sum is σ = 17877586182. Its totient is φ = 5959195392.

The previous prime is 11918390777. The next prime is 11918390807. The reversal of 11918390786 is 68709381911.

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., 7386543025 + 4531847761 = 85945^2 + 67319^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2979597695 + ... + 2979597698.

Almost surely, 2^11918390786 is an apocalyptic number.

11918390786 is a deficient number, since it is larger than the sum of its proper divisors (5959195396).

11918390786 is an equidigital number, since it uses as much as digits as its factorization.

11918390786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959195395.

The product of its (nonzero) digits is 653184, while the sum is 53.

The spelling of 11918390786 in words is "eleven billion, nine hundred eighteen million, three hundred ninety thousand, seven hundred eighty-six".