2081618 has 24 divisors (see below), whose sum is σ = 3964464. Its totient is φ = 810600.

The previous prime is 2081617. The next prime is 2081627. The reversal of 2081618 is 8161802.

It is not an unprimeable number, because it can be changed into a prime (2081617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (165186).

2^2081618 is an apocalyptic number.

2081618 is a deficient number, since it is larger than the sum of its proper divisors (1882846).

2081618 is a wasteful number, since it uses less digits than its factorization.

2081618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958 (or 1951 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2081618 is about 1442.7813417147. The cubic root of 2081618 is about 127.6831764112.

The spelling of 2081618 in words is "two million, eighty-one thousand, six hundred eighteen".