20001715890211 has 8 divisors (see below), whose sum is σ = 21871882809648. Its totient is φ = 18140187156000.

The previous prime is 20001715890203. The next prime is 20001715890217. The reversal of 20001715890211 is 11209851710002.

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 20001715890211 - 2³ = 20001715890203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001715890217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2159541460 + ... + 2159550721.

It is an arithmetic number, because the mean of its divisors is an integer number (2733985351206).

Almost surely, 2^{20001715890211} is an apocalyptic number.

20001715890211 is a deficient number, since it is larger than the sum of its proper divisors (1870166919437).

20001715890211 is a wasteful number, since it uses less digits than its factorization.

20001715890211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319092613.

The product of its (nonzero) digits is 10080, while the sum is 37.

The spelling of 20001715890211 in words is "twenty trillion, one billion, seven hundred fifteen million, eight hundred ninety thousand, two hundred eleven".