18240785 has 8 divisors (see below), whose sum is σ = 22102080. Its totient is φ = 14450544.

The previous prime is 18240773. The next prime is 18240787. The reversal of 18240785 is 58704281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18240785 - 2⁸ = 18240529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18240787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17195 + ... + 18224.

It is an arithmetic number, because the mean of its divisors is an integer number (2762760).

Almost surely, 2^18240785 is an apocalyptic number.

It is an amenable number.

18240785 is a deficient number, since it is larger than the sum of its proper divisors (3861295).

18240785 is a wasteful number, since it uses less digits than its factorization.

18240785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35527.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 18240785 is about 4270.9232023065. The cubic root of 18240785 is about 263.2375508441.

The spelling of 18240785 in words is "eighteen million, two hundred forty thousand, seven hundred eighty-five".