20643206522 has 32 divisors (see below), whose sum is σ = 33745590144. Its totient is φ = 9432460800.

The previous prime is 20643206513. The next prime is 20643206533. The reversal of 20643206522 is 22560234602.

20643206522 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×20643206522² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259043 + ... + 329225.

It is an arithmetic number, because the mean of its divisors is an integer number (1054549692).

Almost surely, 2^20643206522 is an apocalyptic number.

20643206522 is a deficient number, since it is larger than the sum of its proper divisors (13102383622).

20643206522 is a wasteful number, since it uses less digits than its factorization.

20643206522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70454.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 20643206522 in words is "twenty billion, six hundred forty-three million, two hundred six thousand, five hundred twenty-two".