19439618094 has 36 divisors (see below), whose sum is σ = 45608341896. Its totient is φ = 5981420016.

The previous prime is 19439618087. The next prime is 19439618117. The reversal of 19439618094 is 49081693491.

It is a happy number.

19439618094 is a `hidden beast` number, since 1 + 94 + 396 + 1 + 80 + 94 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 19439618094.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3192162 + ... + 3198245.

It is an arithmetic number, because the mean of its divisors is an integer number (1266898386).

Almost surely, 2^19439618094 is an apocalyptic number.

19439618094 is an abundant number, since it is smaller than the sum of its proper divisors (26168723802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19439618094 is a wasteful number, since it uses less digits than its factorization.

19439618094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390441 (or 6390425 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 19439618094 in words is "nineteen billion, four hundred thirty-nine million, six hundred eighteen thousand, ninety-four".