18086949 has 8 divisors (see below), whose sum is σ = 26795520. Its totient is φ = 12057948.

The previous prime is 18086941. The next prime is 18086983. The reversal of 18086949 is 94968081.

It is not a de Polignac number, because 18086949 - 2³ = 18086941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18086941) 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, 334917 + ... + 334970.

It is an arithmetic number, because the mean of its divisors is an integer number (3349440).

Almost surely, 2^18086949 is an apocalyptic number.

It is an amenable number.

18086949 is a deficient number, since it is larger than the sum of its proper divisors (8708571).

18086949 is an equidigital number, since it uses as much as digits as its factorization.

18086949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669896 (or 669890 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 18086949 is about 4252.8753802575. The cubic root of 18086949 is about 262.4954448189.

The spelling of 18086949 in words is "eighteen million, eighty-six thousand, nine hundred forty-nine".