20123345113 has 16 divisors (see below), whose sum is σ = 21788928000. Its totient is φ = 18524251152.

The previous prime is 20123345087. The next prime is 20123345117. The reversal of 20123345113 is 31154332102.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123345113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123345117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43068 + ... + 205186.

It is an arithmetic number, because the mean of its divisors is an integer number (1361808000).

Almost surely, 2^20123345113 is an apocalyptic number.

It is an amenable number.

20123345113 is a deficient number, since it is larger than the sum of its proper divisors (1665582887).

20123345113 is a wasteful number, since it uses less digits than its factorization.

20123345113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162324.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 20123345113 its reverse (31154332102), we get a palindrome (51277677215).

The spelling of 20123345113 in words is "twenty billion, one hundred twenty-three million, three hundred forty-five thousand, one hundred thirteen".