20113232128 has 36 divisors (see below), whose sum is σ = 43797711888. Its totient is φ = 9142376960.

The previous prime is 20113232107. The next prime is 20113232129. The reversal of 20113232128 is 82123231102.

It is a super-2 number, since 2×20113232128² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20113232129) 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, 3568426 + ... + 3574057.

It is an arithmetic number, because the mean of its divisors is an integer number (1216603108).

Almost surely, 2^20113232128 is an apocalyptic number.

It is an amenable number.

20113232128 is an abundant number, since it is smaller than the sum of its proper divisors (23684479760).

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

20113232128 is an equidigital number, since it uses as much as digits as its factorization.

20113232128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7142510 (or 7142496 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 20113232128 in words is "twenty billion, one hundred thirteen million, two hundred thirty-two thousand, one hundred twenty-eight".