2118204 has 48 divisors (see below), whose sum is σ = 5994240. Its totient is φ = 641520.

The previous prime is 2118187. The next prime is 2118209. The reversal of 2118204 is 4028112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297 + ... + 2079.

It is an arithmetic number, because the mean of its divisors is an integer number (124880).

2^2118204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2997120).

2118204 is an abundant number, since it is smaller than the sum of its proper divisors (3876036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2118204 is a wasteful number, since it uses less digits than its factorization.

2118204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2118204 is about 1455.4050982458. The cubic root of 2118204 is about 128.4268788169.

It can be divided in two parts, 21 and 18204, that added together give a square (18225 = 135²).

The spelling of 2118204 in words is "two million, one hundred eighteen thousand, two hundred four".