204134413021 has 12 divisors (see below), whose sum is σ = 259049979360. Its totient is φ = 159065775960.

The previous prime is 204134413019. The next prime is 204134413031. The reversal of 204134413021 is 120314431402.

It is not a de Polignac number, because 204134413021 - 2¹ = 204134413019 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 (204134413031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189363481 + ... + 189364558.

It is an arithmetic number, because the mean of its divisors is an integer number (21587498280).

Almost surely, 2^204134413021 is an apocalyptic number.

It is an amenable number.

204134413021 is a deficient number, since it is larger than the sum of its proper divisors (54915566339).

204134413021 is a wasteful number, since it uses less digits than its factorization.

204134413021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378728064 (or 378728057 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 204134413021 its reverse (120314431402), we get a palindrome (324448844423).

The spelling of 204134413021 in words is "two hundred four billion, one hundred thirty-four million, four hundred thirteen thousand, twenty-one".