18885991922 has 32 divisors (see below), whose sum is σ = 32992496640. Its totient is φ = 7940434320.

The previous prime is 18885991921. The next prime is 18885991933. The reversal of 18885991922 is 22919958881.

It is not an unprimeable number, because it can be changed into a prime (18885991921) 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 15 ways as a sum of consecutive naturals, for example, 382283 + ... + 428849.

It is an arithmetic number, because the mean of its divisors is an integer number (1031015520).

Almost surely, 2^18885991922 is an apocalyptic number.

18885991922 is a deficient number, since it is larger than the sum of its proper divisors (14106504718).

18885991922 is a wasteful number, since it uses less digits than its factorization.

18885991922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47126.

The product of its digits is 7464960, while the sum is 62.

The spelling of 18885991922 in words is "eighteen billion, eight hundred eighty-five million, nine hundred ninety-one thousand, nine hundred twenty-two".