21703645312 has 32 divisors (see below), whose sum is σ = 43247738880. Its totient is φ = 10849310976.

The previous prime is 21703645283. The next prime is 21703645331. The reversal of 21703645312 is 21354630712.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615553 + ... + 649855.

It is an arithmetic number, because the mean of its divisors is an integer number (1351491840).

Almost surely, 2^21703645312 is an apocalyptic number.

It is an amenable number.

21703645312 is a deficient number, since it is larger than the sum of its proper divisors (21544093568).

21703645312 is an equidigital number, since it uses as much as digits as its factorization.

21703645312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39260 (or 39248 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 21703645312 in words is "twenty-one billion, seven hundred three million, six hundred forty-five thousand, three hundred twelve".