20538538352020 has 24 divisors (see below), whose sum is σ = 46448694427464. Its totient is φ = 7583460314496.

The previous prime is 20538538351993. The next prime is 20538538352029. The reversal of 20538538352020 is 2025383583502.

It can be written as a sum of positive squares in 4 ways, for example, as 1759246765956 + 18779291586064 = 1326366^2 + 4333508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20538538352029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39497188879 + ... + 39497189398.

It is an arithmetic number, because the mean of its divisors is an integer number (1935362267811).

Almost surely, 2^{20538538352020} is an apocalyptic number.

20538538352020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20538538352020 is an abundant number, since it is smaller than the sum of its proper divisors (25910156075444).

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

20538538352020 is a wasteful number, since it uses less digits than its factorization.

20538538352020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78994378299 (or 78994378297 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 20538538352020 in words is "twenty trillion, five hundred thirty-eight billion, five hundred thirty-eight million, three hundred fifty-two thousand, twenty".