204653345 has 24 divisors (see below), whose sum is σ = 271227768. Its totient is φ = 147363840.

The previous prime is 204653341. The next prime is 204653357. The reversal of 204653345 is 543356402.

It can be written as a sum of positive squares in 12 ways, for example, as 204375616 + 277729 = 14296^2 + 527^2 .

It is not a de Polignac number, because 204653345 - 2² = 204653341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204653341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108329 + ... + 110201.

It is an arithmetic number, because the mean of its divisors is an integer number (11301157).

Almost surely, 2^204653345 is an apocalyptic number.

It is an amenable number.

204653345 is a deficient number, since it is larger than the sum of its proper divisors (66574423).

204653345 is a wasteful number, since it uses less digits than its factorization.

204653345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 204653345 is about 14305.7102235436. The cubic root of 204653345 is about 589.3043078413.

The spelling of 204653345 in words is "two hundred four million, six hundred fifty-three thousand, three hundred forty-five".