30305638173 has 4 divisors (see below), whose sum is σ = 40407517568. Its totient is φ = 20203758780.

The previous prime is 30305638171. The next prime is 30305638177. The reversal of 30305638173 is 37183650303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30305638173 - 2¹ = 30305638171 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 (30305638171) 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, 5050939693 + ... + 5050939698.

It is an arithmetic number, because the mean of its divisors is an integer number (10101879392).

Almost surely, 2^30305638173 is an apocalyptic number.

It is an amenable number.

30305638173 is a deficient number, since it is larger than the sum of its proper divisors (10101879395).

30305638173 is a wasteful number, since it uses less digits than its factorization.

30305638173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101879394.

The product of its (nonzero) digits is 136080, while the sum is 39.

The spelling of 30305638173 in words is "thirty billion, three hundred five million, six hundred thirty-eight thousand, one hundred seventy-three".