2200018 has 4 divisors (see below), whose sum is σ = 3300030. Its totient is φ = 1100008.

The previous prime is 2200013. The next prime is 2200031. The reversal of 2200018 is 8100022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2199289 + 729 = 1483^2 + 27^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2199980 and 2200007.

It is not an unprimeable number, because it can be changed into a prime (2200013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550003 + ... + 550006.

2^2200018 is an apocalyptic number.

2200018 is a deficient number, since it is larger than the sum of its proper divisors (1100012).

2200018 is a wasteful number, since it uses less digits than its factorization.

2200018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100011.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2200018 is about 1483.2457652055. The cubic root of 2200018 is about 130.0594993909.

The spelling of 2200018 in words is "two million, two hundred thousand, eighteen".