2018631085 has 16 divisors (see below), whose sum is σ = 2566215216. Its totient is φ = 1519100928.

The previous prime is 2018631047. The next prime is 2018631103. The reversal of 2018631085 is 5801368102.

It can be written as a sum of positive squares in 8 ways, for example, as 2082249 + 2016548836 = 1443^2 + 44906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018631085 - 2⁹ = 2018630573 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 2018631085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189727 + ... + 200083.

It is an arithmetic number, because the mean of its divisors is an integer number (160388451).

Almost surely, 2^2018631085 is an apocalyptic number.

It is an amenable number.

2018631085 is a deficient number, since it is larger than the sum of its proper divisors (547584131).

2018631085 is a wasteful number, since it uses less digits than its factorization.

2018631085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12672.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2018631085 is about 44929.1785480216. The cubic root of 2018631085 is about 1263.8212467288.

Adding to 2018631085 its reverse (5801368102), we get a palindrome (7819999187).

The spelling of 2018631085 in words is "two billion, eighteen million, six hundred thirty-one thousand, eighty-five".