20320644216103 has 16 divisors (see below), whose sum is σ = 25335449323776. Its totient is φ = 15833880613440.

The previous prime is 20320644216091. The next prime is 20320644216127. The reversal of 20320644216103 is 30161244602302.

It is a cyclic number.

It is not a de Polignac number, because 20320644216103 - 2⁵ = 20320644216071 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 (20320644216143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43801 + ... + 6375202.

It is an arithmetic number, because the mean of its divisors is an integer number (1583465582736).

Almost surely, 2^{20320644216103} is an apocalyptic number.

20320644216103 is a deficient number, since it is larger than the sum of its proper divisors (5014805107673).

20320644216103 is a wasteful number, since it uses less digits than its factorization.

20320644216103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460134.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 20320644216103 its reverse (30161244602302), we get a palindrome (50481888818405).

The spelling of 20320644216103 in words is "twenty trillion, three hundred twenty billion, six hundred forty-four million, two hundred sixteen thousand, one hundred three".