18989462528 has 44 divisors (see below), whose sum is σ = 38036002980. Its totient is φ = 9475817472.

The previous prime is 18989462509. The next prime is 18989462539. The reversal of 18989462528 is 82526498981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16147293184 + 2842169344 = 127072^2 + 53312^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503000 + ... + 539432.

Almost surely, 2^18989462528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18989462528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19018001490).

18989462528 is an abundant number, since it is smaller than the sum of its proper divisors (19046540452).

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

18989462528 is an equidigital number, since it uses as much as digits as its factorization.

18989462528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36962 (or 36944 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 62.

The spelling of 18989462528 in words is "eighteen billion, nine hundred eighty-nine million, four hundred sixty-two thousand, five hundred twenty-eight".