20123313103213 has 32 divisors (see below), whose sum is σ = 21575503128960. Its totient is φ = 18702149652480.

The previous prime is 20123313103189. The next prime is 20123313103261. The reversal of 20123313103213 is 31230131332102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123313103213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123313103273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1444491858 + ... + 1444505788.

It is an arithmetic number, because the mean of its divisors is an integer number (674234472780).

Almost surely, 2^{20123313103213} is an apocalyptic number.

It is an amenable number.

20123313103213 is a deficient number, since it is larger than the sum of its proper divisors (1452190025747).

20123313103213 is a wasteful number, since it uses less digits than its factorization.

20123313103213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16557.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20123313103213 its reverse (31230131332102), we get a palindrome (51353444435315).

The spelling of 20123313103213 in words is "twenty trillion, one hundred twenty-three billion, three hundred thirteen million, one hundred three thousand, two hundred thirteen".