204420111 has 16 divisors (see below), whose sum is σ = 317856000. Its totient is φ = 116810904.

The previous prime is 204420109. The next prime is 204420143. The reversal of 204420111 is 111024402.

204420111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204420111 - 2¹ = 204420109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204420011) 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, 98301 + ... + 100358.

It is an arithmetic number, because the mean of its divisors is an integer number (19866000).

Almost surely, 2^204420111 is an apocalyptic number.

204420111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

204420111 is a deficient number, since it is larger than the sum of its proper divisors (113435889).

204420111 is an equidigital number, since it uses as much as digits as its factorization.

204420111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198683 (or 198669 counting only the distinct ones).

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

The square root of 204420111 is about 14297.5561198409. The cubic root of 204420111 is about 589.0803550761.

Adding to 204420111 its reverse (111024402), we get a palindrome (315444513).

It can be divided in two parts, 2044 and 20111, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 204420111 in words is "two hundred four million, four hundred twenty thousand, one hundred eleven".