20123110013 has 8 divisors (see below), whose sum is σ = 20705794776. Its totient is φ = 19547944000.

The previous prime is 20123109961. The next prime is 20123110039. The reversal of 20123110013 is 31001132102.

It can be written as a sum of positive squares in 4 ways, for example, as 5639709604 + 14483400409 = 75098^2 + 120347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20123110013 - 2⁸ = 20123109757 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 20123110013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123110093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1874258 + ... + 1884963.

It is an arithmetic number, because the mean of its divisors is an integer number (2588224347).

Almost surely, 2^20123110013 is an apocalyptic number.

It is an amenable number.

20123110013 is a deficient number, since it is larger than the sum of its proper divisors (582684763).

20123110013 is a wasteful number, since it uses less digits than its factorization.

20123110013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759375.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20123110013 its reverse (31001132102), we get a palindrome (51124242115).

The spelling of 20123110013 in words is "twenty billion, one hundred twenty-three million, one hundred ten thousand, thirteen".