204812919 has 12 divisors (see below), whose sum is σ = 300008592. Its totient is φ = 134618400.

The previous prime is 204812911. The next prime is 204812921. The reversal of 204812919 is 919218402.

It is not a de Polignac number, because 204812919 - 2³ = 204812911 is a prime.

It is a super-2 number, since 2×204812919² = 83896663578601122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204812911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159622 + ... + 160899.

It is an arithmetic number, because the mean of its divisors is an integer number (25000716).

Almost surely, 2^204812919 is an apocalyptic number.

204812919 is a deficient number, since it is larger than the sum of its proper divisors (95195673).

204812919 is a wasteful number, since it uses less digits than its factorization.

204812919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320598 (or 320595 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 204812919 is about 14311.2864201650. The cubic root of 204812919 is about 589.4574337935.

The spelling of 204812919 in words is "two hundred four million, eight hundred twelve thousand, nine hundred nineteen".