18988245536 has 96 divisors (see below), whose sum is σ = 42617534400. Its totient is φ = 8255554560.

The previous prime is 18988245527. The next prime is 18988245547. The reversal of 18988245536 is 63554288981.

It is a super-3 number, since 3×18988245536³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1408106 + ... + 1421526.

It is an arithmetic number, because the mean of its divisors is an integer number (443932650).

Almost surely, 2^18988245536 is an apocalyptic number.

18988245536 is a gapful number since it is divisible by the number (16) 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 18988245536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21308767200).

18988245536 is an abundant number, since it is smaller than the sum of its proper divisors (23629288864).

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

18988245536 is a wasteful number, since it uses less digits than its factorization.

18988245536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13642 (or 13634 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 59.

The spelling of 18988245536 in words is "eighteen billion, nine hundred eighty-eight million, two hundred forty-five thousand, five hundred thirty-six".