20960911 has 2 divisors, whose sum is σ = 20960912. Its totient is φ = 20960910.

The previous prime is 20960893. The next prime is 20960923. The reversal of 20960911 is 11906902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20960911 - 2⁵ = 20960879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20960911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20960941) 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 as a sum of consecutive naturals, namely, 10480455 + 10480456.

It is an arithmetic number, because the mean of its divisors is an integer number (10480456).

Almost surely, 2^20960911 is an apocalyptic number.

20960911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20960911 is an equidigital number, since it uses as much as digits as its factorization.

20960911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 20960911 is about 4578.3087488722. The cubic root of 20960911 is about 275.7211310205.

The spelling of 20960911 in words is "twenty million, nine hundred sixty thousand, nine hundred eleven".