18391893074 has 8 divisors (see below), whose sum is σ = 27741962160. Its totient is φ = 9144572356.

The previous prime is 18391893053. The next prime is 18391893083. The reversal of 18391893074 is 47039819381.

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, 25686644 + ... + 25687359.

It is an arithmetic number, because the mean of its divisors is an integer number (3467745270).

Almost surely, 2^18391893074 is an apocalyptic number.

18391893074 is a deficient number, since it is larger than the sum of its proper divisors (9350069086).

18391893074 is a wasteful number, since it uses less digits than its factorization.

18391893074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51374184.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 18391893074 in words is "eighteen billion, three hundred ninety-one million, eight hundred ninety-three thousand, seventy-four".