20188085536 has 24 divisors (see below), whose sum is σ = 39753847980. Its totient is φ = 10091870208.

The previous prime is 20188085509. The next prime is 20188085551. The reversal of 20188085536 is 63558088102.

It can be written as a sum of positive squares in 2 ways, for example, as 20135610000 + 52475536 = 141900^2 + 7244^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 88660 + ... + 219628.

Almost surely, 2^20188085536 is an apocalyptic number.

It is an amenable number.

20188085536 is a deficient number, since it is larger than the sum of its proper divisors (19565762444).

20188085536 is a wasteful number, since it uses less digits than its factorization.

20188085536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135796 (or 135788 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 20188085536 in words is "twenty billion, one hundred eighty-eight million, eighty-five thousand, five hundred thirty-six".