18966118323 has 24 divisors (see below), whose sum is σ = 26959143600. Its totient is φ = 11857807360.

The previous prime is 18966118319. The next prime is 18966118333. The reversal of 18966118323 is 32381166981.

It is not a de Polignac number, because 18966118323 - 2² = 18966118319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18966118333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204703 + ... + 282551.

It is an arithmetic number, because the mean of its divisors is an integer number (1123297650).

Almost surely, 2^18966118323 is an apocalyptic number.

18966118323 is a deficient number, since it is larger than the sum of its proper divisors (7993025277).

18966118323 is a wasteful number, since it uses less digits than its factorization.

18966118323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78167 (or 78150 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The spelling of 18966118323 in words is "eighteen billion, nine hundred sixty-six million, one hundred eighteen thousand, three hundred twenty-three".