21726330670 has 16 divisors (see below), whose sum is σ = 42662613168. Its totient is φ = 7900483840.

The previous prime is 21726330649. The next prime is 21726330677. The reversal of 21726330670 is 7603362712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21726330677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98755939 + ... + 98756158.

It is an arithmetic number, because the mean of its divisors is an integer number (2666413323).

Almost surely, 2^21726330670 is an apocalyptic number.

21726330670 is a deficient number, since it is larger than the sum of its proper divisors (20936282498).

21726330670 is a wasteful number, since it uses less digits than its factorization.

21726330670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197512115.

The product of its (nonzero) digits is 63504, while the sum is 37.

The spelling of 21726330670 in words is "twenty-one billion, seven hundred twenty-six million, three hundred thirty thousand, six hundred seventy".