20003686855 has 4 divisors (see below), whose sum is σ = 24004424232. Its totient is φ = 16002949480.

The previous prime is 20003686849. The next prime is 20003686877. The reversal of 20003686855 is 55868630002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55868630002 = 2 ⋅27934315001.

It is not a de Polignac number, because 20003686855 - 2¹¹ = 20003684807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000368681 + ... + 2000368690.

It is an arithmetic number, because the mean of its divisors is an integer number (6001106058).

Almost surely, 2^20003686855 is an apocalyptic number.

20003686855 is a deficient number, since it is larger than the sum of its proper divisors (4000737377).

20003686855 is an equidigital number, since it uses as much as digits as its factorization.

20003686855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000737376.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 20003686855 in words is "twenty billion, three million, six hundred eighty-six thousand, eight hundred fifty-five".