30820945057 has 16 divisors (see below), whose sum is σ = 37106150400. Its totient is φ = 25008417360.

The previous prime is 30820944983. The next prime is 30820945117. The reversal of 30820945057 is 75054902803.

It is a cyclic number.

It is not a de Polignac number, because 30820945057 - 2¹⁵ = 30820912289 is a prime.

It is a super-2 number, since 2×30820945057² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30820945357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87582 + ... + 263272.

It is an arithmetic number, because the mean of its divisors is an integer number (2319134400).

Almost surely, 2^30820945057 is an apocalyptic number.

It is an amenable number.

30820945057 is a deficient number, since it is larger than the sum of its proper divisors (6285205343).

30820945057 is a wasteful number, since it uses less digits than its factorization.

30820945057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177036.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 30820945057 in words is "thirty billion, eight hundred twenty million, nine hundred forty-five thousand, fifty-seven".