18739478528 has 90 divisors (see below), whose sum is σ = 39283438824. Its totient is φ = 8922169344.

The previous prime is 18739478473. The next prime is 18739478533. The reversal of 18739478528 is 82587493781.

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 5 ways as a sum of consecutive naturals, for example, 84033425 + ... + 84033647.

Almost surely, 2^18739478528 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 18739478528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19641719412).

18739478528 is an abundant number, since it is smaller than the sum of its proper divisors (20543960296).

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

18739478528 is an frugal number, since it uses more digits than its factorization.

18739478528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 248 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 62.

The spelling of 18739478528 in words is "eighteen billion, seven hundred thirty-nine million, four hundred seventy-eight thousand, five hundred twenty-eight".