18967509368 has 8 divisors (see below), whose sum is σ = 35564080080. Its totient is φ = 9483754680.

The previous prime is 18967509343. The next prime is 18967509377. The reversal of 18967509368 is 86390576981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 18967509368.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1185469328 + ... + 1185469343.

It is an arithmetic number, because the mean of its divisors is an integer number (4445510010).

Almost surely, 2^18967509368 is an apocalyptic number.

It is an amenable number.

18967509368 is a deficient number, since it is larger than the sum of its proper divisors (16596570712).

18967509368 is a wasteful number, since it uses less digits than its factorization.

18967509368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370938677 (or 2370938673 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 18967509368 in words is "eighteen billion, nine hundred sixty-seven million, five hundred nine thousand, three hundred sixty-eight".