18080374918 has 4 divisors (see below), whose sum is σ = 27120562380. Its totient is φ = 9040187458.

The previous prime is 18080374909. The next prime is 18080374919. The reversal of 18080374918 is 81947308081.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18080374919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4520093728 + ... + 4520093731.

It is an arithmetic number, because the mean of its divisors is an integer number (6780140595).

Almost surely, 2^18080374918 is an apocalyptic number.

18080374918 is a deficient number, since it is larger than the sum of its proper divisors (9040187462).

18080374918 is an equidigital number, since it uses as much as digits as its factorization.

18080374918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9040187461.

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 18080374918 in words is "eighteen billion, eighty million, three hundred seventy-four thousand, nine hundred eighteen".