20346320432021 has 16 divisors (see below), whose sum is σ = 20614968771840. Its totient is φ = 20077952993280.

The previous prime is 20346320432003. The next prime is 20346320432047. The reversal of 20346320432021 is 12023402364302.

It is a cyclic number.

It is not a de Polignac number, because 20346320432021 - 2²⁶ = 20346253323157 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 (20346320432521) 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 15 ways as a sum of consecutive naturals, for example, 1681925045 + ... + 1681937141.

It is an arithmetic number, because the mean of its divisors is an integer number (1288435548240).

Almost surely, 2^{20346320432021} is an apocalyptic number.

It is an amenable number.

20346320432021 is a deficient number, since it is larger than the sum of its proper divisors (268648339819).

20346320432021 is a wasteful number, since it uses less digits than its factorization.

20346320432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21884.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 20346320432021 its reverse (12023402364302), we get a palindrome (32369722796323).

The spelling of 20346320432021 in words is "twenty trillion, three hundred forty-six billion, three hundred twenty million, four hundred thirty-two thousand, twenty-one".