20128113912 has 32 divisors (see below), whose sum is σ = 50323870080. Its totient is φ = 6708893280.

The previous prime is 20128113911. The next prime is 20128113953. The reversal of 20128113912 is 21931182102.

It is a self number, because there is not a number n which added to its sum of digits gives 20128113912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20128113911) 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, 522133 + ... + 559355.

It is an arithmetic number, because the mean of its divisors is an integer number (1572620940).

Almost surely, 2^20128113912 is an apocalyptic number.

It is an amenable number.

20128113912 is an abundant number, since it is smaller than the sum of its proper divisors (30195756168).

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

20128113912 is a wasteful number, since it uses less digits than its factorization.

20128113912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59763 (or 59759 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The spelling of 20128113912 in words is "twenty billion, one hundred twenty-eight million, one hundred thirteen thousand, nine hundred twelve".