18089658838 has 8 divisors (see below), whose sum is σ = 28314248688. Its totient is φ = 8651575944.

The previous prime is 18089658823. The next prime is 18089658883. The reversal of 18089658838 is 83885698081.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18089658838.

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, 196626681 + ... + 196626772.

It is an arithmetic number, because the mean of its divisors is an integer number (3539281086).

Almost surely, 2^18089658838 is an apocalyptic number.

18089658838 is a deficient number, since it is larger than the sum of its proper divisors (10224589850).

18089658838 is a wasteful number, since it uses less digits than its factorization.

18089658838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393253478.

The product of its (nonzero) digits is 26542080, while the sum is 64.

The spelling of 18089658838 in words is "eighteen billion, eighty-nine million, six hundred fifty-eight thousand, eight hundred thirty-eight".