30453173021 has 4 divisors (see below), whose sum is σ = 30453613344. Its totient is φ = 30452732700.

The previous prime is 30453173011. The next prime is 30453173029. The reversal of 30453173021 is 12037135403.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12037135403 = 30497 ⋅394699.

It is a cyclic number.

It is not a de Polignac number, because 30453173021 - 2¹⁴ = 30453156637 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 (30453173029) 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, 91265 + ... + 263126.

It is an arithmetic number, because the mean of its divisors is an integer number (7613403336).

Almost surely, 2^30453173021 is an apocalyptic number.

It is an amenable number.

30453173021 is a deficient number, since it is larger than the sum of its proper divisors (440323).

30453173021 is an equidigital number, since it uses as much as digits as its factorization.

30453173021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440322.

The product of its (nonzero) digits is 7560, while the sum is 29.

The spelling of 30453173021 in words is "thirty billion, four hundred fifty-three million, one hundred seventy-three thousand, twenty-one".