204534354505 has 32 divisors (see below), whose sum is σ = 269605244160. Its totient is φ = 148038900480.

The previous prime is 204534354457. The next prime is 204534354509. The reversal of 204534354505 is 505453435402.

It is not a de Polignac number, because 204534354505 - 2⁷ = 204534354377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204534354509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1030956 + ... + 1213234.

It is an arithmetic number, because the mean of its divisors is an integer number (8425163880).

Almost surely, 2^204534354505 is an apocalyptic number.

It is an amenable number.

204534354505 is a deficient number, since it is larger than the sum of its proper divisors (65070889655).

204534354505 is a wasteful number, since it uses less digits than its factorization.

204534354505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182641.

The product of its (nonzero) digits is 720000, while the sum is 40.

Adding to 204534354505 its reverse (505453435402), we get a palindrome (709987789907).

The spelling of 204534354505 in words is "two hundred four billion, five hundred thirty-four million, three hundred fifty-four thousand, five hundred five".