18441383388 has 24 divisors (see below), whose sum is σ = 44513684880. Its totient is φ = 5935157760.

The previous prime is 18441383357. The next prime is 18441383393. The reversal of 18441383388 is 88338314481.

It is a self number, because there is not a number n which added to its sum of digits gives 18441383388.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 26495893 + ... + 26496588.

It is an arithmetic number, because the mean of its divisors is an integer number (1854736870).

Almost surely, 2^18441383388 is an apocalyptic number.

It is an amenable number.

18441383388 is an abundant number, since it is smaller than the sum of its proper divisors (26072301492).

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

18441383388 is a wasteful number, since it uses less digits than its factorization.

18441383388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52992517 (or 52992515 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 51.

The spelling of 18441383388 in words is "eighteen billion, four hundred forty-one million, three hundred eighty-three thousand, three hundred eighty-eight".