21711260047 has 2 divisors, whose sum is σ = 21711260048. Its totient is φ = 21711260046.

The previous prime is 21711260023. The next prime is 21711260057. The reversal of 21711260047 is 74006211712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21711260047 - 2⁷ = 21711259919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21711260017) 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, 10855630023 + 10855630024.

It is an arithmetic number, because the mean of its divisors is an integer number (10855630024).

Almost surely, 2^21711260047 is an apocalyptic number.

21711260047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21711260047 is an equidigital number, since it uses as much as digits as its factorization.

21711260047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

Adding to 21711260047 its reverse (74006211712), we get a palindrome (95717471759).

The spelling of 21711260047 in words is "twenty-one billion, seven hundred eleven million, two hundred sixty thousand, forty-seven".