18374985 has 16 divisors (see below), whose sum is σ = 32666880. Its totient is φ = 9799920.

The previous prime is 18374981. The next prime is 18374987. The reversal of 18374985 is 58947381.

It is not a de Polignac number, because 18374985 - 2² = 18374981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18374985.

It is not an unprimeable number, because it can be changed into a prime (18374981) 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, 67921 + ... + 68190.

It is an arithmetic number, because the mean of its divisors is an integer number (2041680).

Almost surely, 2^18374985 is an apocalyptic number.

18374985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18374985 is a deficient number, since it is larger than the sum of its proper divisors (14291895).

18374985 is a wasteful number, since it uses less digits than its factorization.

18374985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136125 (or 136119 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 18374985 is about 4286.6053002347. The cubic root of 18374985 is about 263.8815325907.

The spelling of 18374985 in words is "eighteen million, three hundred seventy-four thousand, nine hundred eighty-five".