18253985016 has 32 divisors (see below), whose sum is σ = 46383080400. Its totient is φ = 5984912640.

The previous prime is 18253984999. The next prime is 18253985023. The reversal of 18253985016 is 61058935281.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 6232821 + ... + 6235748.

Almost surely, 2^18253985016 is an apocalyptic number.

It is an amenable number.

18253985016 is an abundant number, since it is smaller than the sum of its proper divisors (28129095384).

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

18253985016 is a wasteful number, since it uses less digits than its factorization.

18253985016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12468639 (or 12468635 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 18253985016 in words is "eighteen billion, two hundred fifty-three million, nine hundred eighty-five thousand, sixteen".