20188505749020 has 96 divisors (see below), whose sum is σ = 64645089051648. Its totient is φ = 4611524838912.

The previous prime is 20188505748899. The next prime is 20188505749039. The reversal of 20188505749020 is 2094750588102.

20188505749020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14928049 + ... + 16224168.

It is an arithmetic number, because the mean of its divisors is an integer number (673386344288).

Almost surely, 2^{20188505749020} is an apocalyptic number.

20188505749020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20188505749020 is an abundant number, since it is smaller than the sum of its proper divisors (44456583302628).

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

20188505749020 is a wasteful number, since it uses less digits than its factorization.

20188505749020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31153779 (or 31153777 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 20188505749020 in words is "twenty trillion, one hundred eighty-eight billion, five hundred five million, seven hundred forty-nine thousand, twenty".