204244432421 has 4 divisors (see below), whose sum is σ = 204435494700. Its totient is φ = 204053370144.

The previous prime is 204244432367. The next prime is 204244432429. The reversal of 204244432421 is 124234442402.

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 45928776100 + 158315656321 = 214310^2 + 397889^2 .

It is a cyclic number.

It is not a de Polignac number, because 204244432421 - 2²² = 204240238117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204244432429) 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, 95529536 + ... + 95531673.

It is an arithmetic number, because the mean of its divisors is an integer number (51108873675).

Almost surely, 2^204244432421 is an apocalyptic number.

It is an amenable number.

204244432421 is a deficient number, since it is larger than the sum of its proper divisors (191062279).

204244432421 is a wasteful number, since it uses less digits than its factorization.

204244432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191062278.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 204244432421 its reverse (124234442402), we get a palindrome (328478874823).

The spelling of 204244432421 in words is "two hundred four billion, two hundred forty-four million, four hundred thirty-two thousand, four hundred twenty-one".