2018385289 has 4 divisors (see below), whose sum is σ = 2018520324. Its totient is φ = 2018250256.

The previous prime is 2018385283. The next prime is 2018385301. The reversal of 2018385289 is 9825838102.

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 284495689 + 1733889600 = 16867^2 + 41640^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018385289 - 2²⁷ = 1884167561 is a prime.

It is a super-2 number, since 2×2018385289² = 8147758349703227042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018385283) 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, 41842 + ... + 76075.

It is an arithmetic number, because the mean of its divisors is an integer number (504630081).

Almost surely, 2^2018385289 is an apocalyptic number.

It is an amenable number.

2018385289 is a deficient number, since it is larger than the sum of its proper divisors (135035).

2018385289 is a wasteful number, since it uses less digits than its factorization.

2018385289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135034.

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 2018385289 is about 44926.4430931272. The cubic root of 2018385289 is about 1263.7699487942.

The spelling of 2018385289 in words is "two billion, eighteen million, three hundred eighty-five thousand, two hundred eighty-nine".