2001818 has 32 divisors (see below), whose sum is σ = 3919104. Its totient is φ = 744192.

The previous prime is 2001809. The next prime is 2001833. The reversal of 2001818 is 8181002.

2001818 is a modest number, since divided by 1818 gives 200 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 2001818.

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, 2771 + ... + 3417.

It is an arithmetic number, because the mean of its divisors is an integer number (122472).

2^2001818 is an apocalyptic number.

2001818 is a deficient number, since it is larger than the sum of its proper divisors (1917286).

2001818 is a wasteful number, since it uses less digits than its factorization.

2001818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 2001818 is about 1414.8561764363. The cubic root of 2001818 is about 126.0302690359.

The spelling of 2001818 in words is "two million, one thousand, eight hundred eighteen".