20536666211 has 8 divisors (see below), whose sum is σ = 21620221200. Its totient is φ = 19453379040.

The previous prime is 20536666127. The next prime is 20536666231. The reversal of 20536666211 is 11266663502.

It is a happy number.

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 20536666211 - 2²² = 20532471907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20536666231) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 101321 + ... + 226581.

It is an arithmetic number, because the mean of its divisors is an integer number (2702527650).

Almost surely, 2^20536666211 is an apocalyptic number.

20536666211 is a deficient number, since it is larger than the sum of its proper divisors (1083554989).

20536666211 is a wasteful number, since it uses less digits than its factorization.

20536666211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133909.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 20536666211 in words is "twenty billion, five hundred thirty-six million, six hundred sixty-six thousand, two hundred eleven".