204535421045 has 4 divisors (see below), whose sum is σ = 245442505260. Its totient is φ = 163628336832.

The previous prime is 204535421033. The next prime is 204535421047. The reversal of 204535421045 is 540124535402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128583919396 + 75951501649 = 358586^2 + 275593^2 .

It is a cyclic number.

It is not a de Polignac number, because 204535421045 - 2⁶ = 204535420981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204535420996 and 204535421014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204535421047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20453542100 + ... + 20453542109.

It is an arithmetic number, because the mean of its divisors is an integer number (61360626315).

Almost surely, 2^204535421045 is an apocalyptic number.

It is an amenable number.

204535421045 is a deficient number, since it is larger than the sum of its proper divisors (40907084215).

204535421045 is an equidigital number, since it uses as much as digits as its factorization.

204535421045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40907084214.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 204535421045 its reverse (540124535402), we get a palindrome (744659956447).

The spelling of 204535421045 in words is "two hundred four billion, five hundred thirty-five million, four hundred twenty-one thousand, forty-five".