19316939894 has 32 divisors (see below), whose sum is σ = 35131786560. Its totient is φ = 7776350208.

The previous prime is 19316939879. The next prime is 19316939921. The reversal of 19316939894 is 49893961391.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 41414 + ... + 200870.

It is an arithmetic number, because the mean of its divisors is an integer number (1097868330).

Almost surely, 2^19316939894 is an apocalyptic number.

19316939894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19316939894 is a deficient number, since it is larger than the sum of its proper divisors (15814846666).

19316939894 is a wasteful number, since it uses less digits than its factorization.

19316939894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159992.

The product of its digits is 11337408, while the sum is 62.

The spelling of 19316939894 in words is "nineteen billion, three hundred sixteen million, nine hundred thirty-nine thousand, eight hundred ninety-four".