21763751752 has 16 divisors (see below), whose sum is σ = 41080909500. Its totient is φ = 10808842560.

The previous prime is 21763751741. The next prime is 21763751753. The reversal of 21763751752 is 25715736712.

It can be written as a sum of positive squares in 2 ways, for example, as 21355145956 + 408605796 = 146134^2 + 20214^2 .

It is not an unprimeable number, because it can be changed into a prime (21763751753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9127899 + ... + 9130282.

Almost surely, 2^21763751752 is an apocalyptic number.

It is an amenable number.

21763751752 is a deficient number, since it is larger than the sum of its proper divisors (19317157748).

21763751752 is a wasteful number, since it uses less digits than its factorization.

21763751752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18258336 (or 18258332 counting only the distinct ones).

The product of its digits is 617400, while the sum is 46.

The spelling of 21763751752 in words is "twenty-one billion, seven hundred sixty-three million, seven hundred fifty-one thousand, seven hundred fifty-two".