2018881 has 6 divisors (see below), whose sum is σ = 2071046. Its totient is φ = 1968000.

The previous prime is 2018873. The next prime is 2018897. The reversal of 2018881 is 1888102.

It can be written as a sum of positive squares in 3 ways, for example, as 540225 + 1478656 = 735^2 + 1216^2 .

It is not a de Polignac number, because 2018881 - 2³ = 2018873 is a prime.

It is a super-2 number, since 2×2018881² = 8151760984322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1081 + ... + 2281.

2^2018881 is an apocalyptic number.

It is an amenable number.

2018881 is a deficient number, since it is larger than the sum of its proper divisors (52165).

2018881 is an equidigital number, since it uses as much as digits as its factorization.

2018881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 2018881 is about 1420.8733229954. The cubic root of 2018881 is about 126.3873400035.

The spelling of 2018881 in words is "two million, eighteen thousand, eight hundred eighty-one".