18988245888 has 64 divisors (see below), whose sum is σ = 50623921920. Its totient is φ = 6306024960.

The previous prime is 18988245851. The next prime is 18988245889. The reversal of 18988245888 is 88854288981.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18988245889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12831 + ... + 195297.

It is an arithmetic number, because the mean of its divisors is an integer number (790998780).

Almost surely, 2^18988245888 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 18988245888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25311960960).

18988245888 is an abundant number, since it is smaller than the sum of its proper divisors (31635676032).

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

18988245888 is a wasteful number, since it uses less digits than its factorization.

18988245888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182755 (or 182743 counting only the distinct ones).

The product of its digits is 94371840, while the sum is 69.

The spelling of 18988245888 in words is "eighteen billion, nine hundred eighty-eight million, two hundred forty-five thousand, eight hundred eighty-eight".