2018631089 has 4 divisors (see below), whose sum is σ = 2073188724. Its totient is φ = 1964073456.

The previous prime is 2018631047. The next prime is 2018631103. The reversal of 2018631089 is 9801368102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9801368102 = 2 ⋅4900684051.

It can be written as a sum of positive squares in 2 ways, for example, as 1451000464 + 567630625 = 38092^2 + 23825^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018631089 - 2⁸ = 2018630833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018631029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27278762 + ... + 27278835.

It is an arithmetic number, because the mean of its divisors is an integer number (518297181).

Almost surely, 2^2018631089 is an apocalyptic number.

It is an amenable number.

2018631089 is a deficient number, since it is larger than the sum of its proper divisors (54557635).

2018631089 is an equidigital number, since it uses as much as digits as its factorization.

2018631089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54557634.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 2018631089 is about 44929.1785925361. The cubic root of 2018631089 is about 1263.8212475636.

The spelling of 2018631089 in words is "two billion, eighteen million, six hundred thirty-one thousand, eighty-nine".