20555110112 has 24 divisors (see below), whose sum is σ = 40569832296. Its totient is φ = 10251660672.

The previous prime is 20555110111. The next prime is 20555110133. The reversal of 20555110112 is 21101155502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555110111) 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, 796298 + ... + 821705.

It is an arithmetic number, because the mean of its divisors is an integer number (1690409679).

Almost surely, 2^20555110112 is an apocalyptic number.

It is an amenable number.

20555110112 is a deficient number, since it is larger than the sum of its proper divisors (20014722184).

20555110112 is a wasteful number, since it uses less digits than its factorization.

20555110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618410 (or 1618402 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 23.

Adding to 20555110112 its reverse (21101155502), we get a palindrome (41656265614).

The spelling of 20555110112 in words is "twenty billion, five hundred fifty-five million, one hundred ten thousand, one hundred twelve".