20410404242321 has 4 divisors (see below), whose sum is σ = 20410820753700. Its totient is φ = 20409987730944.

The previous prime is 20410404242311. The next prime is 20410404242353. The reversal of 20410404242321 is 12324240401402.

It is a happy number.

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 1618950864400 + 18791453377921 = 1272380^2 + 4334911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20410404242321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20410404242311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208182176 + ... + 208280193.

It is an arithmetic number, because the mean of its divisors is an integer number (5102705188425).

Almost surely, 2^{20410404242321} is an apocalyptic number.

It is an amenable number.

20410404242321 is a deficient number, since it is larger than the sum of its proper divisors (416511379).

20410404242321 is an equidigital number, since it uses as much as digits as its factorization.

20410404242321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416511378.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 20410404242321 its reverse (12324240401402), we get a palindrome (32734644643723).

The spelling of 20410404242321 in words is "twenty trillion, four hundred ten billion, four hundred four million, two hundred forty-two thousand, three hundred twenty-one".