20128113882 has 24 divisors (see below), whose sum is σ = 43613556480. Its totient is φ = 6708964680.

The previous prime is 20128113881. The next prime is 20128113911. The reversal of 20128113882 is 28831182102.

It is a super-2 number, since 2×20128113882² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20128113881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 491719 + ... + 531077.

It is an arithmetic number, because the mean of its divisors is an integer number (1817231520).

Almost surely, 2^20128113882 is an apocalyptic number.

20128113882 is an abundant number, since it is smaller than the sum of its proper divisors (23485442598).

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

20128113882 is a wasteful number, since it uses less digits than its factorization.

20128113882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67778 (or 67775 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

Adding to 20128113882 its reverse (28831182102), we get a palindrome (48959295984).

The spelling of 20128113882 in words is "twenty billion, one hundred twenty-eight million, one hundred thirteen thousand, eight hundred eighty-two".