204668919 has 48 divisors (see below), whose sum is σ = 365601600. Its totient is φ = 107440128.

The previous prime is 204668911. The next prime is 204668923. The reversal of 204668919 is 919866402.

It is a happy number.

It is not a de Polignac number, because 204668919 - 2³ = 204668911 is a prime.

It is a super-2 number, since 2×204668919² = 83778732809257122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204668911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 219847 + ... + 220775.

It is an arithmetic number, because the mean of its divisors is an integer number (7616700).

Almost surely, 2^204668919 is an apocalyptic number.

204668919 is a deficient number, since it is larger than the sum of its proper divisors (160932681).

204668919 is a wasteful number, since it uses less digits than its factorization.

204668919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 204668919 is about 14306.2545412837. The cubic root of 204668919 is about 589.3192560333.

The spelling of 204668919 in words is "two hundred four million, six hundred sixty-eight thousand, nine hundred nineteen".