20105631116113 has 4 divisors (see below), whose sum is σ = 20259109216368. Its totient is φ = 19952153015860.

The previous prime is 20105631116107. The next prime is 20105631116149. The reversal of 20105631116113 is 31161113650102.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20105631116113 is a prime.

It is a super-2 number, since 2×20105631116113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20105631116413) 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, 76739049931 + ... + 76739050192.

It is an arithmetic number, because the mean of its divisors is an integer number (5064777304092).

Almost surely, 2^{20105631116113} is an apocalyptic number.

It is an amenable number.

20105631116113 is a deficient number, since it is larger than the sum of its proper divisors (153478100255).

20105631116113 is a wasteful number, since it uses less digits than its factorization.

20105631116113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153478100254.

The product of its (nonzero) digits is 3240, while the sum is 31.

Adding to 20105631116113 its reverse (31161113650102), we get a palindrome (51266744766215).

The spelling of 20105631116113 in words is "twenty trillion, one hundred five billion, six hundred thirty-one million, one hundred sixteen thousand, one hundred thirteen".