18095985 has 12 divisors (see below), whose sum is σ = 31366452. Its totient is φ = 9651168.

The previous prime is 18095981. The next prime is 18095989. The reversal of 18095985 is 58959081.

It is an interprime number because it is at equal distance from previous prime (18095981) and next prime (18095989).

It can be written as a sum of positive squares in 2 ways, for example, as 13571856 + 4524129 = 3684^2 + 2127^2 .

It is not a de Polignac number, because 18095985 - 2² = 18095981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 402133 = 18095985 / (1 + 8 + 0 + 9 + 5 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 18095985.

It is not an unprimeable number, because it can be changed into a prime (18095981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201022 + ... + 201111.

It is an arithmetic number, because the mean of its divisors is an integer number (2613871).

Almost surely, 2^18095985 is an apocalyptic number.

18095985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18095985 is a deficient number, since it is larger than the sum of its proper divisors (13270467).

18095985 is a wasteful number, since it uses less digits than its factorization.

18095985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402144 (or 402141 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 18095985 is about 4253.9375876945. The cubic root of 18095985 is about 262.5391506232.

The spelling of 18095985 in words is "eighteen million, ninety-five thousand, nine hundred eighty-five".