2180018 has 16 divisors (see below), whose sum is σ = 3374784. Its totient is φ = 1055760.

The previous prime is 2179997. The next prime is 2180021. The reversal of 2180018 is 8100812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12971 + ... + 13137.

It is an arithmetic number, because the mean of its divisors is an integer number (210924).

2^2180018 is an apocalyptic number.

2180018 is a deficient number, since it is larger than the sum of its proper divisors (1194766).

2180018 is a wasteful number, since it uses less digits than its factorization.

2180018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337.

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

The square root of 2180018 is about 1476.4884015799. The cubic root of 2180018 is about 129.6641825693.

The spelling of 2180018 in words is "two million, one hundred eighty thousand, eighteen".