21704757710 has 16 divisors (see below), whose sum is σ = 39171654000. Its totient is φ = 8658994176.

The previous prime is 21704757677. The next prime is 21704757713. The reversal of 21704757710 is 1775740712.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21704757713) 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 7 ways as a sum of consecutive naturals, for example, 2859635 + ... + 2867214.

It is an arithmetic number, because the mean of its divisors is an integer number (2448228375).

Almost surely, 2^21704757710 is an apocalyptic number.

21704757710 is a deficient number, since it is larger than the sum of its proper divisors (17466896290).

21704757710 is a wasteful number, since it uses less digits than its factorization.

21704757710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5727235.

The product of its (nonzero) digits is 96040, while the sum is 41.

The spelling of 21704757710 in words is "twenty-one billion, seven hundred four million, seven hundred fifty-seven thousand, seven hundred ten".