21522363236 has 24 divisors (see below), whose sum is σ = 41093592960. Its totient is φ = 9781596000.

The previous prime is 21522363193. The next prime is 21522363347. The reversal of 21522363236 is 63236322512.

It is a junction number, because it is equal to n+sod(n) for n = 21522363196 and 21522363205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355586 + ... + 411686.

It is an arithmetic number, because the mean of its divisors is an integer number (1712233040).

Almost surely, 2^21522363236 is an apocalyptic number.

It is an amenable number.

21522363236 is a deficient number, since it is larger than the sum of its proper divisors (19571229724).

21522363236 is a wasteful number, since it uses less digits than its factorization.

21522363236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64835 (or 64833 counting only the distinct ones).

The product of its digits is 77760, while the sum is 35.

Adding to 21522363236 its reverse (63236322512), we get a palindrome (84758685748).

The spelling of 21522363236 in words is "twenty-one billion, five hundred twenty-two million, three hundred sixty-three thousand, two hundred thirty-six".