21631773050 has 12 divisors (see below), whose sum is σ = 40235097966. Its totient is φ = 8652709200.

The previous prime is 21631773017. The next prime is 21631773067. The reversal of 21631773050 is 5037713612.

It can be written as a sum of positive squares in 3 ways, for example, as 21043273969 + 588499081 = 145063^2 + 24259^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21631773050.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216317681 + ... + 216317780.

Almost surely, 2^21631773050 is an apocalyptic number.

21631773050 is a deficient number, since it is larger than the sum of its proper divisors (18603324916).

21631773050 is a wasteful number, since it uses less digits than its factorization.

21631773050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432635473 (or 432635468 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 21631773050 in words is "twenty-one billion, six hundred thirty-one million, seven hundred seventy-three thousand, fifty".