21522310304 has 48 divisors (see below), whose sum is σ = 46914015456. Its totient is φ = 9636844800.

The previous prime is 21522310297. The next prime is 21522310321. The reversal of 21522310304 is 40301322512.

It is a self number, because there is not a number n which added to its sum of digits gives 21522310304.

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, 432707 + ... + 479874.

It is an arithmetic number, because the mean of its divisors is an integer number (977375322).

Almost surely, 2^21522310304 is an apocalyptic number.

It is an amenable number.

21522310304 is an abundant number, since it is smaller than the sum of its proper divisors (25391705152).

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

21522310304 is a wasteful number, since it uses less digits than its factorization.

21522310304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912669 (or 912661 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 21522310304 its reverse (40301322512), we get a palindrome (61823632816).

The spelling of 21522310304 in words is "twenty-one billion, five hundred twenty-two million, three hundred ten thousand, three hundred four".