18904816394 has 8 divisors (see below), whose sum is σ = 28580510208. Its totient is φ = 9377979660.

The previous prime is 18904816387. The next prime is 18904816417. The reversal of 18904816394 is 49361840981.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37213952 + ... + 37214459.

It is an arithmetic number, because the mean of its divisors is an integer number (3572563776).

Almost surely, 2^18904816394 is an apocalyptic number.

18904816394 is a deficient number, since it is larger than the sum of its proper divisors (9675693814).

18904816394 is a wasteful number, since it uses less digits than its factorization.

18904816394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74428540.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 18904816394 in words is "eighteen billion, nine hundred four million, eight hundred sixteen thousand, three hundred ninety-four".