20115668211 has 16 divisors (see below), whose sum is σ = 27323387520. Its totient is φ = 13159995840.

The previous prime is 20115668203. The next prime is 20115668249. The reversal of 20115668211 is 11286651102.

It is not a de Polignac number, because 20115668211 - 2³ = 20115668203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20115668291) 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 15 ways as a sum of consecutive naturals, for example, 1551 + ... + 200583.

It is an arithmetic number, because the mean of its divisors is an integer number (1707711720).

Almost surely, 2^20115668211 is an apocalyptic number.

20115668211 is a deficient number, since it is larger than the sum of its proper divisors (7207719309).

20115668211 is a wasteful number, since it uses less digits than its factorization.

20115668211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199666.

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 20115668211 in words is "twenty billion, one hundred fifteen million, six hundred sixty-eight thousand, two hundred eleven".