21716714708 has 24 divisors (see below), whose sum is σ = 41289857448. Its totient is φ = 9934396416.

The previous prime is 21716714693. The next prime is 21716714731. The reversal of 21716714708 is 80741761712.

It can be written as a sum of positive squares in 4 ways, for example, as 1751589904 + 19965124804 = 41852^2 + 141298^2 .

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, 1842041 + ... + 1853792.

It is an arithmetic number, because the mean of its divisors is an integer number (1720410727).

Almost surely, 2^21716714708 is an apocalyptic number.

It is an amenable number.

21716714708 is a deficient number, since it is larger than the sum of its proper divisors (19573142740).

21716714708 is a wasteful number, since it uses less digits than its factorization.

21716714708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695963 (or 3695961 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 44.

The spelling of 21716714708 in words is "twenty-one billion, seven hundred sixteen million, seven hundred fourteen thousand, seven hundred eight".