20840267104911 has 6 divisors (see below), whose sum is σ = 30102608040440. Its totient is φ = 13893511403268.

The previous prime is 20840267104889. The next prime is 20840267104913. The reversal of 20840267104911 is 11940176204802.

20840267104911 is a `hidden beast` number, since 20 + 84 + 0 + 2 + 67 + 1 + 0 + 491 + 1 = 666.

It is not a de Polignac number, because 20840267104911 - 2⁹ = 20840267104399 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 (20840267104913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1157792616931 + ... + 1157792616948.

Almost surely, 2^{20840267104911} is an apocalyptic number.

20840267104911 is a deficient number, since it is larger than the sum of its proper divisors (9262340935529).

20840267104911 is a wasteful number, since it uses less digits than its factorization.

20840267104911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315585233885 (or 2315585233882 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 20840267104911 in words is "twenty trillion, eight hundred forty billion, two hundred sixty-seven million, one hundred four thousand, nine hundred eleven".