18819441688 has 32 divisors (see below), whose sum is σ = 35510670000. Its totient is φ = 9350097408.

The previous prime is 18819441661. The next prime is 18819441703. The reversal of 18819441688 is 88614491881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920020 + ... + 940252.

Almost surely, 2^18819441688 is an apocalyptic number.

It is an amenable number.

18819441688 is a deficient number, since it is larger than the sum of its proper divisors (16691228312).

18819441688 is a wasteful number, since it uses less digits than its factorization.

18819441688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20971 (or 20967 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 58.

The spelling of 18819441688 in words is "eighteen billion, eight hundred nineteen million, four hundred forty-one thousand, six hundred eighty-eight".