18411685 has 4 divisors (see below), whose sum is σ = 22094028. Its totient is φ = 14729344.

The previous prime is 18411683. The next prime is 18411689. The reversal of 18411685 is 58611481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12737761 + 5673924 = 3569^2 + 2382^2 .

It is a cyclic number.

It is not a de Polignac number, because 18411685 - 2¹ = 18411683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18411685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18411683) 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 3 ways as a sum of consecutive naturals, for example, 1841164 + ... + 1841173.

It is an arithmetic number, because the mean of its divisors is an integer number (5523507).

Almost surely, 2^18411685 is an apocalyptic number.

It is an amenable number.

18411685 is a deficient number, since it is larger than the sum of its proper divisors (3682343).

18411685 is an equidigital number, since it uses as much as digits as its factorization.

18411685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682342.

The product of its digits is 7680, while the sum is 34.

The square root of 18411685 is about 4290.8839415673. The cubic root of 18411685 is about 264.0570975751.

The spelling of 18411685 in words is "eighteen million, four hundred eleven thousand, six hundred eighty-five".