20201685203517 has 8 divisors (see below), whose sum is σ = 26943953172096. Its totient is φ = 13463603685312.

The previous prime is 20201685203503. The next prime is 20201685203527. The reversal of 20201685203517 is 71530258610202.

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

It is not a de Polignac number, because 20201685203517 - 2⁴ = 20201685203501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201685203527) by changing a digit.

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, 1046601333 + ... + 1046620634.

It is an arithmetic number, because the mean of its divisors is an integer number (3367994146512).

Almost surely, 2^{20201685203517} is an apocalyptic number.

It is an amenable number.

20201685203517 is a deficient number, since it is larger than the sum of its proper divisors (6742267968579).

20201685203517 is a wasteful number, since it uses less digits than its factorization.

20201685203517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093225187.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 20201685203517 in words is "twenty trillion, two hundred one billion, six hundred eighty-five million, two hundred three thousand, five hundred seventeen".