20105631116112 has 20 divisors (see below), whose sum is σ = 51939547050080. Its totient is φ = 6701877038688.

The previous prime is 20105631116107. The next prime is 20105631116149. The reversal of 20105631116112 is 21161113650102.

It is a self number, because there is not a number n which added to its sum of digits gives 20105631116112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209433657412 + ... + 209433657507.

It is an arithmetic number, because the mean of its divisors is an integer number (2596977352504).

Almost surely, 2^{20105631116112} is an apocalyptic number.

It is an amenable number.

20105631116112 is an abundant number, since it is smaller than the sum of its proper divisors (31833915933968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20105631116112 is a wasteful number, since it uses less digits than its factorization.

20105631116112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418867314930 (or 418867314924 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

Adding to 20105631116112 its reverse (21161113650102), we get a palindrome (41266744766214).

The spelling of 20105631116112 in words is "twenty trillion, one hundred five billion, six hundred thirty-one million, one hundred sixteen thousand, one hundred twelve".