2011366891 has 16 divisors (see below), whose sum is σ = 2105352000. Its totient is φ = 1919131648.

The previous prime is 2011366873. The next prime is 2011366919. The reversal of 2011366891 is 1986631102.

It is a cyclic number.

It is not a de Polignac number, because 2011366891 - 2¹⁵ = 2011334123 is a prime.

It is a super-2 number, since 2×2011366891² = 8091193540422011762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011366891.

It is not an unprimeable number, because it can be changed into a prime (2011366991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470690 + ... + 1472056.

It is an arithmetic number, because the mean of its divisors is an integer number (131584500).

Almost surely, 2^2011366891 is an apocalyptic number.

2011366891 is a deficient number, since it is larger than the sum of its proper divisors (93985109).

2011366891 is a wasteful number, since it uses less digits than its factorization.

2011366891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 2011366891 is about 44848.2651949883. The cubic root of 2011366891 is about 1262.3034397253.

Adding to 2011366891 its reverse (1986631102), we get a palindrome (3997997993).

The spelling of 2011366891 in words is "two billion, eleven million, three hundred sixty-six thousand, eight hundred ninety-one".