18916079938 has 8 divisors (see below), whose sum is σ = 32427565632. Its totient is φ = 8106891396.

The previous prime is 18916079929. The next prime is 18916079939. The reversal of 18916079938 is 83997061981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18916079939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675574270 + ... + 675574297.

It is an arithmetic number, because the mean of its divisors is an integer number (4053445704).

Almost surely, 2^18916079938 is an apocalyptic number.

18916079938 is a deficient number, since it is larger than the sum of its proper divisors (13511485694).

18916079938 is a wasteful number, since it uses less digits than its factorization.

18916079938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351148576.

The product of its (nonzero) digits is 5878656, while the sum is 61.

The spelling of 18916079938 in words is "eighteen billion, nine hundred sixteen million, seventy-nine thousand, nine hundred thirty-eight".