18940768118 has 4 divisors (see below), whose sum is σ = 28411152180. Its totient is φ = 9470384058.

The previous prime is 18940768109. The next prime is 18940768123. The reversal of 18940768118 is 81186704981.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18940768118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4735192028 + ... + 4735192031.

It is an arithmetic number, because the mean of its divisors is an integer number (7102788045).

Almost surely, 2^18940768118 is an apocalyptic number.

18940768118 is a deficient number, since it is larger than the sum of its proper divisors (9470384062).

18940768118 is an equidigital number, since it uses as much as digits as its factorization.

18940768118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9470384061.

The product of its (nonzero) digits is 774144, while the sum is 53.

The spelling of 18940768118 in words is "eighteen billion, nine hundred forty million, seven hundred sixty-eight thousand, one hundred eighteen".