30391920445 has 4 divisors (see below), whose sum is σ = 36470304540. Its totient is φ = 24313536352.

The previous prime is 30391920443. The next prime is 30391920499. The reversal of 30391920445 is 54402919303.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15006495001 + 15385425444 = 122501^2 + 124038^2 .

It is a cyclic number.

It is not a de Polignac number, because 30391920445 - 2¹ = 30391920443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30391920398 and 30391920407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30391920443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3039192040 + ... + 3039192049.

It is an arithmetic number, because the mean of its divisors is an integer number (9117576135).

Almost surely, 2^30391920445 is an apocalyptic number.

It is an amenable number.

30391920445 is a deficient number, since it is larger than the sum of its proper divisors (6078384095).

30391920445 is an equidigital number, since it uses as much as digits as its factorization.

30391920445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078384094.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 30391920445 in words is "thirty billion, three hundred ninety-one million, nine hundred twenty thousand, four hundred forty-five".