18805149 has 16 divisors (see below), whose sum is σ = 30392640. Its totient is φ = 11396880.

The previous prime is 18805133. The next prime is 18805159. The reversal of 18805149 is 94150881.

It is not a de Polignac number, because 18805149 - 2⁴ = 18805133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18805109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31362 + ... + 31955.

It is an arithmetic number, because the mean of its divisors is an integer number (1899540).

Almost surely, 2^18805149 is an apocalyptic number.

It is an amenable number.

18805149 is a deficient number, since it is larger than the sum of its proper divisors (11587491).

18805149 is a wasteful number, since it uses less digits than its factorization.

18805149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63337 (or 63331 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18805149 is about 4336.4904012346. The cubic root of 18805149 is about 265.9248520453.

The spelling of 18805149 in words is "eighteen million, eight hundred five thousand, one hundred forty-nine".