20157585635784 has 32 divisors (see below), whose sum is σ = 50394215056320. Its totient is φ = 6719161749696.

The previous prime is 20157585635717. The next prime is 20157585635813. The reversal of 20157585635784 is 48753658575102.

It is a happy number.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3090189 + ... + 7061475.

It is an arithmetic number, because the mean of its divisors is an integer number (1574819220510).

Almost surely, 2^{20157585635784} is an apocalyptic number.

20157585635784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20157585635784 is an abundant number, since it is smaller than the sum of its proper divisors (30236629420536).

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

20157585635784 is a wasteful number, since it uses less digits than its factorization.

20157585635784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182789 (or 4182785 counting only the distinct ones).

The product of its (nonzero) digits is 282240000, while the sum is 66.

The spelling of 20157585635784 in words is "twenty trillion, one hundred fifty-seven billion, five hundred eighty-five million, six hundred thirty-five thousand, seven hundred eighty-four".