20313220123 has 4 divisors (see below), whose sum is σ = 23215108720. Its totient is φ = 17411331528.

The previous prime is 20313220121. The next prime is 20313220157. The reversal of 20313220123 is 32102231302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20313220123 - 2¹ = 20313220121 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 20313220123.

It is not an unprimeable number, because it can be changed into a prime (20313220121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450944288 + ... + 1450944301.

It is an arithmetic number, because the mean of its divisors is an integer number (5803777180).

Almost surely, 2^20313220123 is an apocalyptic number.

20313220123 is a deficient number, since it is larger than the sum of its proper divisors (2901888597).

20313220123 is an equidigital number, since it uses as much as digits as its factorization.

20313220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901888596.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20313220123 its reverse (32102231302), we get a palindrome (52415451425).

The spelling of 20313220123 in words is "twenty billion, three hundred thirteen million, two hundred twenty thousand, one hundred twenty-three".