21711260079 has 24 divisors (see below), whose sum is σ = 31435812720. Its totient is φ = 14439562368.

The previous prime is 21711260057. The next prime is 21711260093. The reversal of 21711260079 is 97006211712.

It is a happy number.

It is not a de Polignac number, because 21711260079 - 2⁵ = 21711260047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21711260279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9450859 + ... + 9453155.

It is an arithmetic number, because the mean of its divisors is an integer number (1309825530).

Almost surely, 2^21711260079 is an apocalyptic number.

21711260079 is a deficient number, since it is larger than the sum of its proper divisors (9724552641).

21711260079 is a wasteful number, since it uses less digits than its factorization.

21711260079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359 (or 4356 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The spelling of 21711260079 in words is "twenty-one billion, seven hundred eleven million, two hundred sixty thousand, seventy-nine".