20105305055 has 16 divisors (see below), whose sum is σ = 26376551424. Its totient is φ = 14590440480.

The previous prime is 20105305043. The next prime is 20105305057. The reversal of 20105305055 is 55050350102.

It is not a de Polignac number, because 20105305055 - 2⁴ = 20105305039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105305057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369299 + ... + 420228.

It is an arithmetic number, because the mean of its divisors is an integer number (1648534464).

Almost surely, 2^20105305055 is an apocalyptic number.

20105305055 is a deficient number, since it is larger than the sum of its proper divisors (6271246369).

20105305055 is a wasteful number, since it uses less digits than its factorization.

20105305055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790006.

The product of its (nonzero) digits is 3750, while the sum is 26.

Adding to 20105305055 its reverse (55050350102), we get a palindrome (75155655157).

The spelling of 20105305055 in words is "twenty billion, one hundred five million, three hundred five thousand, fifty-five".