18116138 has 8 divisors (see below), whose sum is σ = 27315588. Its totient is φ = 9010944.

The previous prime is 18116129. The next prime is 18116149. The reversal of 18116138 is 83161181.

It can be written as a sum of positive squares in 2 ways, for example, as 14922769 + 3193369 = 3863^2 + 1787^2 .

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 18116138.

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, 23081 + ... + 23852.

Almost surely, 2^18116138 is an apocalyptic number.

18116138 is a deficient number, since it is larger than the sum of its proper divisors (9199450).

18116138 is a wasteful number, since it uses less digits than its factorization.

18116138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47128.

The product of its digits is 1152, while the sum is 29.

The square root of 18116138 is about 4256.3056751131. The cubic root of 18116138 is about 262.6365753390.

The spelling of 18116138 in words is "eighteen million, one hundred sixteen thousand, one hundred thirty-eight".