18086138 has 16 divisors (see below), whose sum is σ = 32637120. Its totient is φ = 7343136.

The previous prime is 18086137. The next prime is 18086143. The reversal of 18086138 is 83168081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18086098 and 18086107.

It is not an unprimeable number, because it can be changed into a prime (18086137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33731 + ... + 34262.

It is an arithmetic number, because the mean of its divisors is an integer number (2039820).

Almost surely, 2^18086138 is an apocalyptic number.

18086138 is a deficient number, since it is larger than the sum of its proper divisors (14550982).

18086138 is a wasteful number, since it uses less digits than its factorization.

18086138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68021.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 18086138 is about 4252.7800319321. The cubic root of 18086138 is about 262.4915214193.

The spelling of 18086138 in words is "eighteen million, eighty-six thousand, one hundred thirty-eight".