20216097823 has 2 divisors, whose sum is σ = 20216097824. Its totient is φ = 20216097822.

The previous prime is 20216097821. The next prime is 20216097857. The reversal of 20216097823 is 32879061202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20216097823 - 2¹ = 20216097821 is a prime.

It is a super-2 number, since 2×20216097823² (a number of 21 digits) contains 22 as substring.

Together with 20216097821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20216097821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10108048911 + 10108048912.

It is an arithmetic number, because the mean of its divisors is an integer number (10108048912).

Almost surely, 2^20216097823 is an apocalyptic number.

20216097823 is a deficient number, since it is larger than the sum of its proper divisors (1).

20216097823 is an equidigital number, since it uses as much as digits as its factorization.

20216097823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 20216097823 in words is "twenty billion, two hundred sixteen million, ninety-seven thousand, eight hundred twenty-three".