20521644316522 has 16 divisors (see below), whose sum is σ = 30881647728000. Its totient is φ = 10227789468288.

The previous prime is 20521644316501. The next prime is 20521644316597. The reversal of 20521644316522 is 22561344612502.

It is a super-2 number, since 2×20521644316522² (a number of 27 digits) contains 22 as substring.

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, 5450272 + ... + 8411227.

It is an arithmetic number, because the mean of its divisors is an integer number (1930102983000).

Almost surely, 2^{20521644316522} is an apocalyptic number.

20521644316522 is a deficient number, since it is larger than the sum of its proper divisors (10360003411478).

20521644316522 is a wasteful number, since it uses less digits than its factorization.

20521644316522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13863885.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 20521644316522 in words is "twenty trillion, five hundred twenty-one billion, six hundred forty-four million, three hundred sixteen thousand, five hundred twenty-two".