20328120312243 has 16 divisors (see below), whose sum is σ = 27638271088896. Its totient is φ = 13287630290400.

The previous prime is 20328120312239. The next prime is 20328120312263. The reversal of 20328120312243 is 34221302182302.

It is a happy number.

It is not a de Polignac number, because 20328120312243 - 2² = 20328120312239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20328120312263) 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, 325646005 + ... + 325708422.

It is an arithmetic number, because the mean of its divisors is an integer number (1727391943056).

Almost surely, 2^{20328120312243} is an apocalyptic number.

20328120312243 is a deficient number, since it is larger than the sum of its proper divisors (7310150776653).

20328120312243 is a wasteful number, since it uses less digits than its factorization.

20328120312243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651354634.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 20328120312243 its reverse (34221302182302), we get a palindrome (54549422494545).

The spelling of 20328120312243 in words is "twenty trillion, three hundred twenty-eight billion, one hundred twenty million, three hundred twelve thousand, two hundred forty-three".