18444868788 has 24 divisors (see below), whose sum is σ = 43455875008. Its totient is φ = 6088597056.

The previous prime is 18444868787. The next prime is 18444868801. The reversal of 18444868788 is 88786844481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18444868787) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7460281 + ... + 7462752.

Almost surely, 2^18444868788 is an apocalyptic number.

It is an amenable number.

18444868788 is an abundant number, since it is smaller than the sum of its proper divisors (25011006220).

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

18444868788 is a wasteful number, since it uses less digits than its factorization.

18444868788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14923143 (or 14923141 counting only the distinct ones).

The product of its digits is 88080384, while the sum is 66.

The spelling of 18444868788 in words is "eighteen billion, four hundred forty-four million, eight hundred sixty-eight thousand, seven hundred eighty-eight".