204346404421 has 4 divisors (see below), whose sum is σ = 205383696012. Its totient is φ = 203309112832.

The previous prime is 204346404419. The next prime is 204346404473. The reversal of 204346404421 is 124404643402.

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 126497592225 + 77848812196 = 355665^2 + 279014^2 .

It is a cyclic number.

It is not a de Polignac number, because 204346404421 - 2¹ = 204346404419 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 (204346404481) 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, 518645500 + ... + 518645893.

It is an arithmetic number, because the mean of its divisors is an integer number (51345924003).

Almost surely, 2^204346404421 is an apocalyptic number.

It is an amenable number.

204346404421 is a deficient number, since it is larger than the sum of its proper divisors (1037291591).

204346404421 is a wasteful number, since it uses less digits than its factorization.

204346404421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037291590.

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 204346404421 in words is "two hundred four billion, three hundred forty-six million, four hundred four thousand, four hundred twenty-one".