20766946565111 has 4 divisors (see below), whose sum is σ = 20840850289824. Its totient is φ = 20693042840400.

The previous prime is 20766946565047. The next prime is 20766946565161. The reversal of 20766946565111 is 11156564966702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20766946565111 - 2⁶ = 20766946565047 is a prime.

It is a super-2 number, since 2×20766946565111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20766946565161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36951861935 + ... + 36951862496.

It is an arithmetic number, because the mean of its divisors is an integer number (5210212572456).

Almost surely, 2^{20766946565111} is an apocalyptic number.

20766946565111 is a deficient number, since it is larger than the sum of its proper divisors (73903724713).

20766946565111 is an equidigital number, since it uses as much as digits as its factorization.

20766946565111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73903724712.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 20766946565111 in words is "twenty trillion, seven hundred sixty-six billion, nine hundred forty-six million, five hundred sixty-five thousand, one hundred eleven".