21982827422 has 4 divisors (see below), whose sum is σ = 32974241136. Its totient is φ = 10991413710.

The previous prime is 21982827397. The next prime is 21982827431. The reversal of 21982827422 is 22472828912.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5495706854 + ... + 5495706857.

It is an arithmetic number, because the mean of its divisors is an integer number (8243560284).

Almost surely, 2^21982827422 is an apocalyptic number.

21982827422 is a deficient number, since it is larger than the sum of its proper divisors (10991413714).

21982827422 is a wasteful number, since it uses less digits than its factorization.

21982827422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10991413713.

The product of its digits is 516096, while the sum is 47.

The spelling of 21982827422 in words is "twenty-one billion, nine hundred eighty-two million, eight hundred twenty-seven thousand, four hundred twenty-two".