20123242113 has 32 divisors (see below), whose sum is σ = 29111322240. Its totient is φ = 12291056640.

The previous prime is 20123242093. The next prime is 20123242127. The reversal of 20123242113 is 31124232102.

It is not a de Polignac number, because 20123242113 - 2⁶ = 20123242049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20123242113.

It is not an unprimeable number, because it can be changed into a prime (20123242913) 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, 4137303 + ... + 4142163.

It is an arithmetic number, because the mean of its divisors is an integer number (909728820).

Almost surely, 2^20123242113 is an apocalyptic number.

It is an amenable number.

20123242113 is a deficient number, since it is larger than the sum of its proper divisors (8988080127).

20123242113 is a wasteful number, since it uses less digits than its factorization.

20123242113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5649.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20123242113 its reverse (31124232102), we get a palindrome (51247474215).

The spelling of 20123242113 in words is "twenty billion, one hundred twenty-three million, two hundred forty-two thousand, one hundred thirteen".