18086923 has 8 divisors (see below), whose sum is σ = 18769680. Its totient is φ = 17408160.

The previous prime is 18086899. The next prime is 18086933. The reversal of 18086923 is 32968081.

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

It is a cyclic number.

It is not a de Polignac number, because 18086923 - 2⁵ = 18086891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18086933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10728 + ... + 12298.

It is an arithmetic number, because the mean of its divisors is an integer number (2346210).

Almost surely, 2^18086923 is an apocalyptic number.

18086923 is a deficient number, since it is larger than the sum of its proper divisors (682757).

18086923 is a wasteful number, since it uses less digits than its factorization.

18086923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 18086923 is about 4252.8723235009. The cubic root of 18086923 is about 262.4953190397.

The spelling of 18086923 in words is "eighteen million, eighty-six thousand, nine hundred twenty-three".