21763109728 has 12 divisors (see below), whose sum is σ = 42846122340. Its totient is φ = 10881554848.

The previous prime is 21763109701. The next prime is 21763109729. The reversal of 21763109728 is 82790136712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21763109729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340048558 + ... + 340048621.

It is an arithmetic number, because the mean of its divisors is an integer number (3570510195).

Almost surely, 2^21763109728 is an apocalyptic number.

It is an amenable number.

21763109728 is a deficient number, since it is larger than the sum of its proper divisors (21083012612).

21763109728 is an equidigital number, since it uses as much as digits as its factorization.

21763109728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680097189 (or 680097181 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 21763109728 in words is "twenty-one billion, seven hundred sixty-three million, one hundred nine thousand, seven hundred twenty-eight".