20766151111 has 4 divisors (see below), whose sum is σ = 20810618712. Its totient is φ = 20721683512.

The previous prime is 20766151057. The next prime is 20766151163. The reversal of 20766151111 is 11115166702.

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 20766151111 - 2⁷ = 20766150983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20766151181) 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 3 ways as a sum of consecutive naturals, for example, 22233100 + ... + 22234033.

It is an arithmetic number, because the mean of its divisors is an integer number (5202654678).

Almost surely, 2^20766151111 is an apocalyptic number.

20766151111 is a deficient number, since it is larger than the sum of its proper divisors (44467601).

20766151111 is an equidigital number, since it uses as much as digits as its factorization.

20766151111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44467600.

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 20766151111 in words is "twenty billion, seven hundred sixty-six million, one hundred fifty-one thousand, one hundred eleven".