18985322648 has 64 divisors (see below), whose sum is σ = 36523872000. Its totient is φ = 9249748992.

The previous prime is 18985322623. The next prime is 18985322669. The reversal of 18985322648 is 84622358981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18985322593 and 18985322602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17306036 + ... + 17307132.

It is an arithmetic number, because the mean of its divisors is an integer number (570685500).

Almost surely, 2^18985322648 is an apocalyptic number.

It is an amenable number.

18985322648 is a deficient number, since it is larger than the sum of its proper divisors (17538549352).

18985322648 is a wasteful number, since it uses less digits than its factorization.

18985322648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524 (or 1520 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 56.

The spelling of 18985322648 in words is "eighteen billion, nine hundred eighty-five million, three hundred twenty-two thousand, six hundred forty-eight".