18440404382 has 8 divisors (see below), whose sum is σ = 27663206952. Its totient is φ = 9219335400.

The previous prime is 18440404379. The next prime is 18440404417. The reversal of 18440404382 is 28340404481.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 406469 + ... + 449552.

It is an arithmetic number, because the mean of its divisors is an integer number (3457900869).

Almost surely, 2^18440404382 is an apocalyptic number.

18440404382 is a deficient number, since it is larger than the sum of its proper divisors (9222802570).

18440404382 is a wasteful number, since it uses less digits than its factorization.

18440404382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866794.

The product of its (nonzero) digits is 98304, while the sum is 38.

Subtracting 18440404382 from its reverse (28340404481), we obtain a palindrome (9900000099).

The spelling of 18440404382 in words is "eighteen billion, four hundred forty million, four hundred four thousand, three hundred eighty-two".