204520945 has 8 divisors (see below), whose sum is σ = 256095936. Its totient is φ = 156502896.

The previous prime is 204520937. The next prime is 204520949. The reversal of 204520945 is 549025402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204520945 - 2³ = 204520937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204520949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889107 + ... + 889336.

It is an arithmetic number, because the mean of its divisors is an integer number (32011992).

Almost surely, 2^204520945 is an apocalyptic number.

It is an amenable number.

204520945 is a deficient number, since it is larger than the sum of its proper divisors (51574991).

204520945 is a wasteful number, since it uses less digits than its factorization.

204520945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778471.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 204520945 is about 14301.0819520762. The cubic root of 204520945 is about 589.1771974143.

The spelling of 204520945 in words is "two hundred four million, five hundred twenty thousand, nine hundred forty-five".