18710193394 has 16 divisors (see below), whose sum is σ = 28148646240. Its totient is φ = 9327352320.

The previous prime is 18710193391. The next prime is 18710193427. The reversal of 18710193394 is 49339101781.

It is not an unprimeable number, because it can be changed into a prime (18710193391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971442 + ... + 990514.

It is an arithmetic number, because the mean of its divisors is an integer number (1759290390).

Almost surely, 2^18710193394 is an apocalyptic number.

18710193394 is a deficient number, since it is larger than the sum of its proper divisors (9438452846).

18710193394 is a wasteful number, since it uses less digits than its factorization.

18710193394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20505.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 18710193394 in words is "eighteen billion, seven hundred ten million, one hundred ninety-three thousand, three hundred ninety-four".