204243404342401 has 16 divisors (see below), whose sum is σ = 222016840657920. Its totient is φ = 187326709162560.

The previous prime is 204243404342399. The next prime is 204243404342423. The reversal of 204243404342401 is 104243404342402.

It is not a de Polignac number, because 204243404342401 - 2¹ = 204243404342399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204243404342491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1313942410 + ... + 1314097843.

It is an arithmetic number, because the mean of its divisors is an integer number (13876052541120).

Almost surely, 2^{204243404342401} is an apocalyptic number.

It is an amenable number.

204243404342401 is a deficient number, since it is larger than the sum of its proper divisors (17773436315519).

204243404342401 is a wasteful number, since it uses less digits than its factorization.

204243404342401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628040416.

The product of its (nonzero) digits is 294912, while the sum is 37.

Adding to 204243404342401 its reverse (104243404342402), we get a palindrome (308486808684803).

Subtracting from 204243404342401 its reverse (104243404342402), we obtain a palindrome (99999999999999).

The spelling of 204243404342401 in words is "two hundred four trillion, two hundred forty-three billion, four hundred four million, three hundred forty-two thousand, four hundred one".