18966118322 has 6 divisors (see below), whose sum is σ = 28449469629. Its totient is φ = 9482961780.

The previous prime is 18966118319. The next prime is 18966118333. The reversal of 18966118322 is 22381166981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16622687041 + 2343431281 = 128929^2 + 48409^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=97381.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 146072 + ... + 243452.

Almost surely, 2^18966118322 is an apocalyptic number.

18966118322 is a deficient number, since it is larger than the sum of its proper divisors (9483351307).

18966118322 is an frugal number, since it uses more digits than its factorization.

18966118322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194764 (or 97383 counting only the distinct ones).

The product of its digits is 248832, while the sum is 47.

The spelling of 18966118322 in words is "eighteen billion, nine hundred sixty-six million, one hundred eighteen thousand, three hundred twenty-two".