21763713228 has 24 divisors (see below), whose sum is σ = 50823758832. Its totient is φ = 7248605184.

The previous prime is 21763713227. The next prime is 21763713241. The reversal of 21763713228 is 82231736712.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21763713228.

It is not an unprimeable number, because it can be changed into a prime (21763713227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 730525 + ... + 759732.

It is an arithmetic number, because the mean of its divisors is an integer number (2117656618).

Almost surely, 2^21763713228 is an apocalyptic number.

It is an amenable number.

21763713228 is an abundant number, since it is smaller than the sum of its proper divisors (29060045604).

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

21763713228 is a wasteful number, since it uses less digits than its factorization.

21763713228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491481 (or 1491479 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The spelling of 21763713228 in words is "twenty-one billion, seven hundred sixty-three million, seven hundred thirteen thousand, two hundred twenty-eight".