204031330421 has 4 divisors (see below), whose sum is σ = 204619317312. Its totient is φ = 203443343532.

The previous prime is 204031330381. The next prime is 204031330427. The reversal of 204031330421 is 124033130402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204031330421 - 2¹⁸ = 204031068277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204031330427) 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, 293992925 + ... + 293993618.

It is an arithmetic number, because the mean of its divisors is an integer number (51154829328).

Almost surely, 2^204031330421 is an apocalyptic number.

It is an amenable number.

204031330421 is a deficient number, since it is larger than the sum of its proper divisors (587986891).

204031330421 is an equidigital number, since it uses as much as digits as its factorization.

204031330421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587986890.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 204031330421 its reverse (124033130402), we get a palindrome (328064460823).

The spelling of 204031330421 in words is "two hundred four billion, thirty-one million, three hundred thirty thousand, four hundred twenty-one".