204420533 has 4 divisors (see below), whose sum is σ = 205118508. Its totient is φ = 203722560.

The previous prime is 204420521. The next prime is 204420569. The reversal of 204420533 is 335024402.

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 185558884 + 18861649 = 13622^2 + 4343^2 .

It is a cyclic number.

It is not a de Polignac number, because 204420533 - 2¹² = 204416437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204420499 and 204420508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204420583) 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, 348548 + ... + 349133.

It is an arithmetic number, because the mean of its divisors is an integer number (51279627).

Almost surely, 2^204420533 is an apocalyptic number.

It is an amenable number.

204420533 is a deficient number, since it is larger than the sum of its proper divisors (697975).

204420533 is an equidigital number, since it uses as much as digits as its factorization.

204420533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697974.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 204420533 is about 14297.5708776002. The cubic root of 204420533 is about 589.0807604370.

Adding to 204420533 its reverse (335024402), we get a palindrome (539444935).

The spelling of 204420533 in words is "two hundred four million, four hundred twenty thousand, five hundred thirty-three".