18337985 has 16 divisors (see below), whose sum is σ = 23400576. Its totient is φ = 13747968.

The previous prime is 18337973. The next prime is 18337987. The reversal of 18337985 is 58973381.

It is a happy number.

It is not a de Polignac number, because 18337985 - 2⁸ = 18337729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18337987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37412 + ... + 37898.

It is an arithmetic number, because the mean of its divisors is an integer number (1462536).

Almost surely, 2^18337985 is an apocalyptic number.

It is an amenable number.

18337985 is a deficient number, since it is larger than the sum of its proper divisors (5062591).

18337985 is a wasteful number, since it uses less digits than its factorization.

18337985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952.

The product of its digits is 181440, while the sum is 44.

The square root of 18337985 is about 4282.2873560750. The cubic root of 18337985 is about 263.7042956676.

The spelling of 18337985 in words is "eighteen million, three hundred thirty-seven thousand, nine hundred eighty-five".