204011 has 4 divisors (see below), whose sum is σ = 210624. Its totient is φ = 197400.

The previous prime is 204007. The next prime is 204013. The reversal of 204011 is 110402.

204011 = 24² + 25² + ... + 85².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110402 = 2 ⋅55201.

It is a cyclic number.

It is not a de Polignac number, because 204011 - 2² = 204007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204011.

It is not an unprimeable number, because it can be changed into a prime (204013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3260 + ... + 3321.

It is an arithmetic number, because the mean of its divisors is an integer number (52656).

2²⁰⁴⁰¹¹ is an apocalyptic number.

204011 is a deficient number, since it is larger than the sum of its proper divisors (6613).

204011 is an equidigital number, since it uses as much as digits as its factorization.

204011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 204011 is about 451.6757686660. The cubic root of 204011 is about 58.8687112285.

Adding to 204011 its reverse (110402), we get a palindrome (314413).

It can be divided in two parts, 20401 and 1, that added together give a palindrome (20402).

The spelling of 204011 in words is "two hundred four thousand, eleven", and thus it is an iban number.