18707085 has 16 divisors (see below), whose sum is σ = 33257280. Its totient is φ = 9977040.

The previous prime is 18707083. The next prime is 18707147. The reversal of 18707085 is 58070781.

It is not a de Polignac number, because 18707085 - 2¹ = 18707083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18707083) 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 15 ways as a sum of consecutive naturals, for example, 69151 + ... + 69420.

It is an arithmetic number, because the mean of its divisors is an integer number (2078580).

Almost surely, 2^18707085 is an apocalyptic number.

18707085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18707085 is a deficient number, since it is larger than the sum of its proper divisors (14550195).

18707085 is a wasteful number, since it uses less digits than its factorization.

18707085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138585 (or 138579 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 18707085 is about 4325.1687828338. The cubic root of 18707085 is about 265.4618030529.

The spelling of 18707085 in words is "eighteen million, seven hundred seven thousand, eighty-five".