30430535021 has 4 divisors (see below), whose sum is σ = 30506422044. Its totient is φ = 30354648000.

The previous prime is 30430535017. The next prime is 30430535027. The reversal of 30430535021 is 12053503403.

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 14834022025 + 15596512996 = 121795^2 + 124886^2 .

It is a cyclic number.

It is not a de Polignac number, because 30430535021 - 2² = 30430535017 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 (30430535027) 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, 37942910 + ... + 37943711.

It is an arithmetic number, because the mean of its divisors is an integer number (7626605511).

Almost surely, 2^30430535021 is an apocalyptic number.

It is an amenable number.

30430535021 is a deficient number, since it is larger than the sum of its proper divisors (75887023).

30430535021 is an equidigital number, since it uses as much as digits as its factorization.

30430535021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75887022.

The product of its (nonzero) digits is 5400, while the sum is 26.

The spelling of 30430535021 in words is "thirty billion, four hundred thirty million, five hundred thirty-five thousand, twenty-one".