18086739 has 8 divisors (see below), whose sum is σ = 26308032. Its totient is φ = 10961640.

The previous prime is 18086729. The next prime is 18086743. The reversal of 18086739 is 93768081.

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

It is not a de Polignac number, because 18086739 - 2⁴ = 18086723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18086739.

It is not an unprimeable number, because it can be changed into a prime (18086729) 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, 274009 + ... + 274074.

It is an arithmetic number, because the mean of its divisors is an integer number (3288504).

Almost surely, 2^18086739 is an apocalyptic number.

18086739 is a deficient number, since it is larger than the sum of its proper divisors (8221293).

18086739 is a wasteful number, since it uses less digits than its factorization.

18086739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548097.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 18086739 is about 4252.8506910072. The cubic root of 18086739 is about 262.4944289067.

The spelling of 18086739 in words is "eighteen million, eighty-six thousand, seven hundred thirty-nine".