21703223712 has 48 divisors (see below), whose sum is σ = 56987304192. Its totient is φ = 7232332800.

The previous prime is 21703223687. The next prime is 21703223713. The reversal of 21703223712 is 21732230712.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 21703223712.

It is not an unprimeable number, because it can be changed into a prime (21703223713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324337 + ... + 385487.

It is an arithmetic number, because the mean of its divisors is an integer number (1187235504).

Almost surely, 2^21703223712 is an apocalyptic number.

It is an amenable number.

21703223712 is an abundant number, since it is smaller than the sum of its proper divisors (35284080480).

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

21703223712 is a wasteful number, since it uses less digits than its factorization.

21703223712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64861 (or 64853 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The spelling of 21703223712 in words is "twenty-one billion, seven hundred three million, two hundred twenty-three thousand, seven hundred twelve".