18987324948 has 108 divisors (see below), whose sum is σ = 50830459680. Its totient is φ = 5975210592.

The previous prime is 18987324931. The next prime is 18987324959. The reversal of 18987324948 is 84942378981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3987393 + ... + 3992151.

Almost surely, 2^18987324948 is an apocalyptic number.

18987324948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18987324948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25415229840).

18987324948 is an abundant number, since it is smaller than the sum of its proper divisors (31843134732).

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

18987324948 is a wasteful number, since it uses less digits than its factorization.

18987324948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114 (or 5090 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 18987324948 in words is "eighteen billion, nine hundred eighty-seven million, three hundred twenty-four thousand, nine hundred forty-eight".