30321320420 has 12 divisors (see below), whose sum is σ = 63674772924. Its totient is φ = 12128528160.

The previous prime is 30321320399. The next prime is 30321320443. The reversal of 30321320420 is 2402312303.

It can be written as a sum of positive squares in 2 ways, for example, as 17740108864 + 12581211556 = 133192^2 + 112166^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1516066021 = 30321320420 / (3 + 0 + 3 + 2 + 1 + 3 + 2 + 0 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 30321320392 and 30321320401.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 758032991 + ... + 758033030.

It is an arithmetic number, because the mean of its divisors is an integer number (5306231077).

Almost surely, 2^30321320420 is an apocalyptic number.

It is an amenable number.

30321320420 is an abundant number, since it is smaller than the sum of its proper divisors (33353452504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30321320420 is a wasteful number, since it uses less digits than its factorization.

30321320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516066030 (or 1516066028 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 30321320420 its reverse (2402312303), we get a palindrome (32723632723).

The spelling of 30321320420 in words is "thirty billion, three hundred twenty-one million, three hundred twenty thousand, four hundred twenty".