20185708012120 has 64 divisors (see below), whose sum is σ = 51973255782720. Its totient is φ = 6911860913664.

The previous prime is 20185708012109. The next prime is 20185708012139. The reversal of 20185708012120 is 2121080758102.

It is a self number, because there is not a number n which added to its sum of digits gives 20185708012120.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 46414747 + ... + 46847626.

It is an arithmetic number, because the mean of its divisors is an integer number (812082121605).

Almost surely, 2^{20185708012120} is an apocalyptic number.

20185708012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20185708012120 is an abundant number, since it is smaller than the sum of its proper divisors (31787547770600).

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

20185708012120 is a wasteful number, since it uses less digits than its factorization.

20185708012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93263164 (or 93263160 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 37.

The spelling of 20185708012120 in words is "twenty trillion, one hundred eighty-five billion, seven hundred eight million, twelve thousand, one hundred twenty".