18389532782 has 8 divisors (see below), whose sum is σ = 27857411352. Its totient is φ = 9103729000.

The previous prime is 18389532773. The next prime is 18389532797. The reversal of 18389532782 is 28723598381.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45518444 + ... + 45518847.

It is an arithmetic number, because the mean of its divisors is an integer number (3482176419).

Almost surely, 2^18389532782 is an apocalyptic number.

18389532782 is a deficient number, since it is larger than the sum of its proper divisors (9467878570).

18389532782 is a wasteful number, since it uses less digits than its factorization.

18389532782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91037394.

The product of its digits is 5806080, while the sum is 56.

The spelling of 18389532782 in words is "eighteen billion, three hundred eighty-nine million, five hundred thirty-two thousand, seven hundred eighty-two".