21712066710 has 16 divisors (see below), whose sum is σ = 52108960176. Its totient is φ = 5789884448.

The previous prime is 21712066709. The next prime is 21712066751. The reversal of 21712066710 is 1766021712.

It is a Curzon number.

It is a congruent number.

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, 361867749 + ... + 361867808.

It is an arithmetic number, because the mean of its divisors is an integer number (3256810011).

Almost surely, 2^21712066710 is an apocalyptic number.

21712066710 is an abundant number, since it is smaller than the sum of its proper divisors (30396893466).

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

21712066710 is a wasteful number, since it uses less digits than its factorization.

21712066710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723735567.

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 21712066710 in words is "twenty-one billion, seven hundred twelve million, sixty-six thousand, seven hundred ten".