18359138 has 8 divisors (see below), whose sum is σ = 31472832. Its totient is φ = 7868196.

The previous prime is 18359137. The next prime is 18359153. The reversal of 18359138 is 83195381.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18359137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655670 + ... + 655697.

It is an arithmetic number, because the mean of its divisors is an integer number (3934104).

Almost surely, 2^18359138 is an apocalyptic number.

18359138 is a deficient number, since it is larger than the sum of its proper divisors (13113694).

18359138 is a wasteful number, since it uses less digits than its factorization.

18359138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311376.

The product of its digits is 25920, while the sum is 38.

The square root of 18359138 is about 4284.7564691590. The cubic root of 18359138 is about 263.8056516514.

The spelling of 18359138 in words is "eighteen million, three hundred fifty-nine thousand, one hundred thirty-eight".