204021320435 has 4 divisors (see below), whose sum is σ = 244825584528. Its totient is φ = 163217056344.

The previous prime is 204021320429. The next prime is 204021320441. The reversal of 204021320435 is 534023120402.

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

It is an interprime number because it is at equal distance from previous prime (204021320429) and next prime (204021320441).

It is a cyclic number.

It is not a de Polignac number, because 204021320435 - 2²⁰ = 204020271859 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20402132039 + ... + 20402132048.

It is an arithmetic number, because the mean of its divisors is an integer number (61206396132).

Almost surely, 2^204021320435 is an apocalyptic number.

204021320435 is a deficient number, since it is larger than the sum of its proper divisors (40804264093).

204021320435 is an equidigital number, since it uses as much as digits as its factorization.

204021320435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40804264092.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 204021320435 its reverse (534023120402), we get a palindrome (738044440837).

The spelling of 204021320435 in words is "two hundred four billion, twenty-one million, three hundred twenty thousand, four hundred thirty-five".