20123113 has 4 divisors (see below), whose sum is σ = 20134800. Its totient is φ = 20111428.

The previous prime is 20123099. The next prime is 20123119. The reversal of 20123113 is 31132102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31132102 = 2 ⋅15566051.

It is a cyclic number.

It is not a de Polignac number, because 20123113 - 2⁹ = 20122601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123093 and 20123102.

It is not an unprimeable number, because it can be changed into a prime (20123119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2695 + ... + 6892.

It is an arithmetic number, because the mean of its divisors is an integer number (5033700).

Almost surely, 2^20123113 is an apocalyptic number.

It is an amenable number.

20123113 is a deficient number, since it is larger than the sum of its proper divisors (11687).

20123113 is an equidigital number, since it uses as much as digits as its factorization.

20123113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11686.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20123113 is about 4485.8792895039. The cubic root of 20123113 is about 271.9975895476.

Adding to 20123113 its reverse (31132102), we get a palindrome (51255215).

The spelling of 20123113 in words is "twenty million, one hundred twenty-three thousand, one hundred thirteen".