2185018807 has 4 divisors (see below), whose sum is σ = 2217631096. Its totient is φ = 2152406520.

The previous prime is 2185018783. The next prime is 2185018817. The reversal of 2185018807 is 7088105812.

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

It is a cyclic number.

It is not a de Polignac number, because 2185018807 - 2⁷ = 2185018679 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 2185018807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185018817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16306044 + ... + 16306177.

It is an arithmetic number, because the mean of its divisors is an integer number (554407774).

Almost surely, 2^2185018807 is an apocalyptic number.

2185018807 is a deficient number, since it is larger than the sum of its proper divisors (32612289).

2185018807 is an equidigital number, since it uses as much as digits as its factorization.

2185018807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32612288.

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 2185018807 is about 46744.1847399225. The cubic root of 2185018807 is about 1297.6325367314.

The spelling of 2185018807 in words is "two billion, one hundred eighty-five million, eighteen thousand, eight hundred seven".