20343431320441 has 4 divisors (see below), whose sum is σ = 20422588641012. Its totient is φ = 20264273999872.

The previous prime is 20343431320391. The next prime is 20343431320469. The reversal of 20343431320441 is 14402313434302.

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 19271748801600 + 1071682518841 = 4389960^2 + 1035221^2 .

It is a cyclic number.

It is not a de Polignac number, because 20343431320441 - 2⁹ = 20343431319929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20343431320397 and 20343431320406.

It is not an unprimeable number, because it can be changed into a prime (20343431320741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39578659900 + ... + 39578660413.

It is an arithmetic number, because the mean of its divisors is an integer number (5105647160253).

Almost surely, 2^{20343431320441} is an apocalyptic number.

It is an amenable number.

20343431320441 is a deficient number, since it is larger than the sum of its proper divisors (79157320571).

20343431320441 is an equidigital number, since it uses as much as digits as its factorization.

20343431320441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79157320570.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 20343431320441 its reverse (14402313434302), we get a palindrome (34745744754743).

The spelling of 20343431320441 in words is "twenty trillion, three hundred forty-three billion, four hundred thirty-one million, three hundred twenty thousand, four hundred forty-one".