21711260080 has 40 divisors (see below), whose sum is σ = 50498455392. Its totient is φ = 8681101824.

The previous prime is 21711260057. The next prime is 21711260093. The reversal of 21711260080 is 8006211712.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×21711260080² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157509 + ... + 261211.

Almost surely, 2^21711260080 is an apocalyptic number.

21711260080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21711260080 is an abundant number, since it is smaller than the sum of its proper divisors (28787195312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21711260080 is a wasteful number, since it uses less digits than its factorization.

21711260080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106333 (or 106327 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

Adding to 21711260080 its reverse (8006211712), we get a palindrome (29717471792).

The spelling of 21711260080 in words is "twenty-one billion, seven hundred eleven million, two hundred sixty thousand, eighty".