21712808060 has 12 divisors (see below), whose sum is σ = 45596896968. Its totient is φ = 8685123216.

The previous prime is 21712808041. The next prime is 21712808069. The reversal of 21712808060 is 6080821712.

It is a self number, because there is not a number n which added to its sum of digits gives 21712808060.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21712808069) 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 in 3 ways as a sum of consecutive naturals, for example, 542820182 + ... + 542820221.

It is an arithmetic number, because the mean of its divisors is an integer number (3799741414).

Almost surely, 2^21712808060 is an apocalyptic number.

21712808060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21712808060 is an abundant number, since it is smaller than the sum of its proper divisors (23884088908).

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

21712808060 is a wasteful number, since it uses less digits than its factorization.

21712808060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085640412 (or 1085640410 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The spelling of 21712808060 in words is "twenty-one billion, seven hundred twelve million, eight hundred eight thousand, sixty".