20928632468693 has 4 divisors (see below), whose sum is σ = 20995927107168. Its totient is φ = 20861337830220.

The previous prime is 20928632468687. The next prime is 20928632468743. The reversal of 20928632468693 is 39686423682902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20928632468693 - 2⁴ = 20928632468677 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 (20928632468603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33647318771 + ... + 33647319392.

It is an arithmetic number, because the mean of its divisors is an integer number (5248981776792).

Almost surely, 2^{20928632468693} is an apocalyptic number.

It is an amenable number.

20928632468693 is a deficient number, since it is larger than the sum of its proper divisors (67294638475).

20928632468693 is an equidigital number, since it uses as much as digits as its factorization.

20928632468693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67294638474.

The product of its (nonzero) digits is 322486272, while the sum is 68.

The spelling of 20928632468693 in words is "twenty trillion, nine hundred twenty-eight billion, six hundred thirty-two million, four hundred sixty-eight thousand, six hundred ninety-three".