204819841 has 2 divisors, whose sum is σ = 204819842. Its totient is φ = 204819840.

The previous prime is 204819833. The next prime is 204819863. The reversal of 204819841 is 148918402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172659600 + 32160241 = 13140^2 + 5671^2 .

It is a cyclic number.

It is not a de Polignac number, because 204819841 - 2³ = 204819833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204819841.

It is not a weakly prime, because it can be changed into another prime (204819341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102409920 + 102409921.

It is an arithmetic number, because the mean of its divisors is an integer number (102409921).

Almost surely, 2^204819841 is an apocalyptic number.

It is an amenable number.

204819841 is a deficient number, since it is larger than the sum of its proper divisors (1).

204819841 is an equidigital number, since it uses as much as digits as its factorization.

204819841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 204819841 is about 14311.5282552214. The cubic root of 204819841 is about 589.4640742899.

The spelling of 204819841 in words is "two hundred four million, eight hundred nineteen thousand, eight hundred forty-one".