18988424268 has 144 divisors (see below), whose sum is σ = 49937682816. Its totient is φ = 5568442880.

The previous prime is 18988424251. The next prime is 18988424281. The reversal of 18988424268 is 86242488981.

It is a super-3 number, since 3×18988424268³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30775096 + ... + 30775712.

It is an arithmetic number, because the mean of its divisors is an integer number (346789464).

Almost surely, 2^18988424268 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 18988424268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24968841408).

18988424268 is an abundant number, since it is smaller than the sum of its proper divisors (30949258548).

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

18988424268 is a wasteful number, since it uses less digits than its factorization.

18988424268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 769 counting only the distinct ones).

The product of its digits is 14155776, while the sum is 60.

The spelling of 18988424268 in words is "eighteen billion, nine hundred eighty-eight million, four hundred twenty-four thousand, two hundred sixty-eight".