20816330055 has 32 divisors (see below), whose sum is σ = 34456100544. Its totient is φ = 10723101696.

The previous prime is 20816329993. The next prime is 20816330063. The reversal of 20816330055 is 55003361802.

It is not a de Polignac number, because 20816330055 - 2⁶ = 20816329991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20816329998 and 20816330025.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 60852 + ... + 212921.

It is an arithmetic number, because the mean of its divisors is an integer number (1076753142).

Almost surely, 2^20816330055 is an apocalyptic number.

20816330055 is a deficient number, since it is larger than the sum of its proper divisors (13639770489).

20816330055 is a wasteful number, since it uses less digits than its factorization.

20816330055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273955.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 20816330055 its reverse (55003361802), we get a palindrome (75819691857).

The spelling of 20816330055 in words is "twenty billion, eight hundred sixteen million, three hundred thirty thousand, fifty-five".