30232320021 has 12 divisors (see below), whose sum is σ = 44159569740. Its totient is φ = 19928420160.

The previous prime is 30232320011. The next prime is 30232320037. The reversal of 30232320021 is 12002323203.

It is a happy number.

30232320021 is a `hidden beast` number, since 302 + 323 + 20 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15753011121 + 14479308900 = 125511^2 + 120330^2 .

It is not a de Polignac number, because 30232320021 - 2⁵ = 30232319989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30232319976 and 30232320003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30232320011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18870810 + ... + 18872411.

It is an arithmetic number, because the mean of its divisors is an integer number (3679964145).

Almost surely, 2^30232320021 is an apocalyptic number.

It is an amenable number.

30232320021 is a deficient number, since it is larger than the sum of its proper divisors (13927249719).

30232320021 is a wasteful number, since it uses less digits than its factorization.

30232320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37743316 (or 37743313 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 30232320021 its reverse (12002323203), we get a palindrome (42234643224).

The spelling of 30232320021 in words is "thirty billion, two hundred thirty-two million, three hundred twenty thousand, twenty-one".