30820055557205 has 16 divisors (see below), whose sum is σ = 38189271619584. Its totient is φ = 23853081584640.

The previous prime is 30820055557171. The next prime is 30820055557217. The reversal of 30820055557205 is 50275555002803.

It is not a de Polignac number, because 30820055557205 - 2¹⁰ = 30820055556181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30820055557205.

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 15 ways as a sum of consecutive naturals, for example, 31206317 + ... + 32178786.

It is an arithmetic number, because the mean of its divisors is an integer number (2386829476224).

Almost surely, 2^{30820055557205} is an apocalyptic number.

It is an amenable number.

30820055557205 is a deficient number, since it is larger than the sum of its proper divisors (7369216062379).

30820055557205 is a wasteful number, since it uses less digits than its factorization.

30820055557205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63388276.

The product of its (nonzero) digits is 2100000, while the sum is 47.

The spelling of 30820055557205 in words is "thirty trillion, eight hundred twenty billion, fifty-five million, five hundred fifty-seven thousand, two hundred five".