204819013 has 16 divisors (see below), whose sum is σ = 241315200. Its totient is φ = 170168256.

The previous prime is 204818981. The next prime is 204819037. The reversal of 204819013 is 310918402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 204819013 - 2⁵ = 204818981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204819913) 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, 74538 + ... + 77236.

It is an arithmetic number, because the mean of its divisors is an integer number (15082200).

Almost surely, 2^204819013 is an apocalyptic number.

It is an amenable number.

204819013 is a deficient number, since it is larger than the sum of its proper divisors (36496187).

204819013 is a wasteful number, since it uses less digits than its factorization.

204819013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 204819013 is about 14311.4993274639. The cubic root of 204819013 is about 589.4632799709.

The spelling of 204819013 in words is "two hundred four million, eight hundred nineteen thousand, thirteen".