20155103112 has 16 divisors (see below), whose sum is σ = 50387757840. Its totient is φ = 6718367696.

The previous prime is 20155103063. The next prime is 20155103123. The reversal of 20155103112 is 21130155102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419897958 + ... + 419898005.

It is an arithmetic number, because the mean of its divisors is an integer number (3149234865).

Almost surely, 2^20155103112 is an apocalyptic number.

It is an amenable number.

20155103112 is an abundant number, since it is smaller than the sum of its proper divisors (30232654728).

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

20155103112 is a wasteful number, since it uses less digits than its factorization.

20155103112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839795972 (or 839795968 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 20155103112 its reverse (21130155102), we get a palindrome (41285258214).

The spelling of 20155103112 in words is "twenty billion, one hundred fifty-five million, one hundred three thousand, one hundred twelve".