19085906864 has 20 divisors (see below), whose sum is σ = 36982313040. Its totient is φ = 9542084160.

The previous prime is 19085906821. The next prime is 19085906869. The reversal of 19085906864 is 46860958091.

It is a happy number.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19085906869) 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, 150122 + ... + 246390.

It is an arithmetic number, because the mean of its divisors is an integer number (1849115652).

Almost surely, 2^19085906864 is an apocalyptic number.

It is an amenable number.

19085906864 is a deficient number, since it is larger than the sum of its proper divisors (17896406176).

19085906864 is a wasteful number, since it uses less digits than its factorization.

19085906864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108668 (or 108662 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 19085906864 in words is "nineteen billion, eighty-five million, nine hundred six thousand, eight hundred sixty-four".