204045345 has 32 divisors (see below), whose sum is σ = 414570240. Its totient is φ = 93277440.

The previous prime is 204045319. The next prime is 204045371. The reversal of 204045345 is 543540402.

204045345 is a `hidden beast` number, since 204 + 0 + 453 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (204045319) and next prime (204045371).

It is not a de Polignac number, because 204045345 - 2⁸ = 204045089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107016 + ... + 108905.

It is an arithmetic number, because the mean of its divisors is an integer number (12955320).

Almost surely, 2^204045345 is an apocalyptic number.

It is an amenable number.

204045345 is an abundant number, since it is smaller than the sum of its proper divisors (210524895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204045345 is a wasteful number, since it uses less digits than its factorization.

204045345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215942 (or 215936 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 204045345 is about 14284.4441613946. Note that the first 3 decimals coincide. The cubic root of 204045345 is about 588.7201453481.

Adding to 204045345 its reverse (543540402), we get a palindrome (747585747).

The spelling of 204045345 in words is "two hundred four million, forty-five thousand, three hundred forty-five".