21629864111 has 2 divisors, whose sum is σ = 21629864112. Its totient is φ = 21629864110.

The previous prime is 21629864071. The next prime is 21629864129. The reversal of 21629864111 is 11146892612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21629864111 - 2¹⁴ = 21629847727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21625864111) 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, 10814932055 + 10814932056.

It is an arithmetic number, because the mean of its divisors is an integer number (10814932056).

Almost surely, 2^21629864111 is an apocalyptic number.

21629864111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21629864111 is an equidigital number, since it uses as much as digits as its factorization.

21629864111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The spelling of 21629864111 in words is "twenty-one billion, six hundred twenty-nine million, eight hundred sixty-four thousand, one hundred eleven".