18922446985 has 32 divisors (see below), whose sum is σ = 25074427392. Its totient is φ = 13621152000.

The previous prime is 18922446971. The next prime is 18922447003. The reversal of 18922446985 is 58964422981.

It is a happy number.

It is not a de Polignac number, because 18922446985 - 2²⁹ = 18385576073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 754467 + ... + 779143.

It is an arithmetic number, because the mean of its divisors is an integer number (783575856).

Almost surely, 2^18922446985 is an apocalyptic number.

It is an amenable number.

18922446985 is a deficient number, since it is larger than the sum of its proper divisors (6151980407).

18922446985 is a wasteful number, since it uses less digits than its factorization.

18922446985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24993.

The product of its digits is 9953280, while the sum is 58.

The spelling of 18922446985 in words is "eighteen billion, nine hundred twenty-two million, four hundred forty-six thousand, nine hundred eighty-five".