20313113123 has 4 divisors (see below), whose sum is σ = 21382224360. Its totient is φ = 19244001888.

The previous prime is 20313113101. The next prime is 20313113137. The reversal of 20313113123 is 32131131302.

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 20313113123 - 2⁸ = 20313112867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20313113095 and 20313113104.

It is not an unprimeable number, because it can be changed into a prime (20313413123) 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, 534555590 + ... + 534555627.

It is an arithmetic number, because the mean of its divisors is an integer number (5345556090).

Almost surely, 2^20313113123 is an apocalyptic number.

20313113123 is a deficient number, since it is larger than the sum of its proper divisors (1069111237).

20313113123 is a wasteful number, since it uses less digits than its factorization.

20313113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069111236.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20313113123 its reverse (32131131302), we get a palindrome (52444244425).

The spelling of 20313113123 in words is "twenty billion, three hundred thirteen million, one hundred thirteen thousand, one hundred twenty-three".