20565055522 has 16 divisors (see below), whose sum is σ = 33672156192. Its totient is φ = 9342128320.

The previous prime is 20565055519. The next prime is 20565055523. The reversal of 20565055522 is 22555056502.

It is not an unprimeable number, because it can be changed into a prime (20565055523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243703 + ... + 317050.

It is an arithmetic number, because the mean of its divisors is an integer number (2104509762).

Almost surely, 2^20565055522 is an apocalyptic number.

20565055522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20565055522 is a deficient number, since it is larger than the sum of its proper divisors (13107100670).

20565055522 is a wasteful number, since it uses less digits than its factorization.

20565055522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562433.

The product of its (nonzero) digits is 150000, while the sum is 37.

The spelling of 20565055522 in words is "twenty billion, five hundred sixty-five million, fifty-five thousand, five hundred twenty-two".