21887522711 has 2 divisors, whose sum is σ = 21887522712. Its totient is φ = 21887522710.

The previous prime is 21887522687. The next prime is 21887522737. The reversal of 21887522711 is 11722578812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21887522711 - 2³⁰ = 20813780887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21887522771) 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, 10943761355 + 10943761356.

It is an arithmetic number, because the mean of its divisors is an integer number (10943761356).

Almost surely, 2^21887522711 is an apocalyptic number.

21887522711 is a deficient number, since it is larger than the sum of its proper divisors (1).

21887522711 is an equidigital number, since it uses as much as digits as its factorization.

21887522711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125440, while the sum is 44.

The spelling of 21887522711 in words is "twenty-one billion, eight hundred eighty-seven million, five hundred twenty-two thousand, seven hundred eleven".