201804 has 24 divisors (see below), whose sum is σ = 479808. Its totient is φ = 66000.

The previous prime is 201797. The next prime is 201809. The reversal of 201804 is 408102.

It is not an unprimeable number, because it can be changed into a prime (201809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679 + ... + 929.

It is an arithmetic number, because the mean of its divisors is an integer number (19992).

2²⁰¹⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

201804 is an abundant number, since it is smaller than the sum of its proper divisors (278004).

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

201804 is a wasteful number, since it uses less digits than its factorization.

201804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 201804 is about 449.2260010284. The cubic root of 201804 is about 58.6556596659.

Adding to 201804 its reverse (408102), we get a palindrome (609906).

It can be divided in two parts, 201 and 804, that multiplied together give a square (161604 = 402²).

The spelling of 201804 in words is "two hundred one thousand, eight hundred four".