20123321311013 has 8 divisors (see below), whose sum is σ = 20236704893280. Its totient is φ = 20009948426800.

The previous prime is 20123321311003. The next prime is 20123321311031. The reversal of 20123321311013 is 31011312332102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123321311013 - 2²⁸ = 20123052875557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123321311013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123321311003) 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 7 ways as a sum of consecutive naturals, for example, 1113206 + ... + 6440952.

It is an arithmetic number, because the mean of its divisors is an integer number (2529588111660).

Almost surely, 2^{20123321311013} is an apocalyptic number.

It is an amenable number.

20123321311013 is a deficient number, since it is larger than the sum of its proper divisors (113383582267).

20123321311013 is a wasteful number, since it uses less digits than its factorization.

20123321311013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5349027.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 20123321311013 its reverse (31011312332102), we get a palindrome (51134633643115).

The spelling of 20123321311013 in words is "twenty trillion, one hundred twenty-three billion, three hundred twenty-one million, three hundred eleven thousand, thirteen".