18899443552 has 48 divisors (see below), whose sum is σ = 40607218512. Its totient is φ = 8587192320.

The previous prime is 18899443501. The next prime is 18899443567. The reversal of 18899443552 is 25534499881.

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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996268 + ... + 1015060.

It is an arithmetic number, because the mean of its divisors is an integer number (845983719).

Almost surely, 2^18899443552 is an apocalyptic number.

It is an amenable number.

18899443552 is an abundant number, since it is smaller than the sum of its proper divisors (21707774960).

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

18899443552 is a wasteful number, since it uses less digits than its factorization.

18899443552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21671 (or 21663 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 58.

The spelling of 18899443552 in words is "eighteen billion, eight hundred ninety-nine million, four hundred forty-three thousand, five hundred fifty-two".