20201683687 has 8 divisors (see below), whose sum is σ = 20810369552. Its totient is φ = 19596297600.

The previous prime is 20201683673. The next prime is 20201683693. The reversal of 20201683687 is 78638610202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20201683687 - 2¹¹ = 20201681639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201683637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812514 + ... + 837007.

It is an arithmetic number, because the mean of its divisors is an integer number (2601296194).

Almost surely, 2^20201683687 is an apocalyptic number.

20201683687 is a deficient number, since it is larger than the sum of its proper divisors (608685865).

20201683687 is a wasteful number, since it uses less digits than its factorization.

20201683687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649889.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 20201683687 in words is "twenty billion, two hundred one million, six hundred eighty-three thousand, six hundred eighty-seven".