20535522056 has 16 divisors (see below), whose sum is σ = 44004690240. Its totient is φ = 8800938000.

The previous prime is 20535522041. The next prime is 20535522127. The reversal of 20535522056 is 65022553502.

It is a super-2 number, since 2×20535522056² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183352820 + ... + 183352931.

It is an arithmetic number, because the mean of its divisors is an integer number (2750293140).

Almost surely, 2^20535522056 is an apocalyptic number.

It is an amenable number.

20535522056 is an abundant number, since it is smaller than the sum of its proper divisors (23469168184).

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

20535522056 is a wasteful number, since it uses less digits than its factorization.

20535522056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366705764 (or 366705760 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 20535522056 in words is "twenty billion, five hundred thirty-five million, five hundred twenty-two thousand, fifty-six".