11967808018 has 8 divisors (see below), whose sum is σ = 17990654220. Its totient is φ = 5970923280.

The previous prime is 11967808001. The next prime is 11967808091. The reversal of 11967808018 is 81080876911.

It can be written as a sum of positive squares in 2 ways, for example, as 11630975409 + 336832609 = 107847^2 + 18353^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 6489213 + ... + 6491056.

Almost surely, 2^11967808018 is an apocalyptic number.

11967808018 is a deficient number, since it is larger than the sum of its proper divisors (6022846202).

11967808018 is a wasteful number, since it uses less digits than its factorization.

11967808018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12980732.

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

The spelling of 11967808018 in words is "eleven billion, nine hundred sixty-seven million, eight hundred eight thousand, eighteen".