20345031424563 has 4 divisors (see below), whose sum is σ = 27126708566088. Its totient is φ = 13563354283040.

The previous prime is 20345031424519. The next prime is 20345031424573. The reversal of 20345031424563 is 36542413054302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20345031424563 - 2⁹ = 20345031424051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20345031424573) 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, 3390838570758 + ... + 3390838570763.

It is an arithmetic number, because the mean of its divisors is an integer number (6781677141522).

Almost surely, 2^{20345031424563} is an apocalyptic number.

20345031424563 is a deficient number, since it is larger than the sum of its proper divisors (6781677141525).

20345031424563 is an equidigital number, since it uses as much as digits as its factorization.

20345031424563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781677141524.

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 20345031424563 its reverse (36542413054302), we get a palindrome (56887444478865).

The spelling of 20345031424563 in words is "twenty trillion, three hundred forty-five billion, thirty-one million, four hundred twenty-four thousand, five hundred sixty-three".