30021305 has 8 divisors (see below), whose sum is σ = 36111744. Its totient is φ = 23959600.

The previous prime is 30021289. The next prime is 30021317. The reversal of 30021305 is 50312003.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30021305 - 2⁴ = 30021289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30021305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4811 + ... + 9120.

It is an arithmetic number, because the mean of its divisors is an integer number (4513968).

Almost surely, 2^30021305 is an apocalyptic number.

It is an amenable number.

30021305 is a deficient number, since it is larger than the sum of its proper divisors (6090439).

30021305 is a wasteful number, since it uses less digits than its factorization.

30021305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14367.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 30021305 is about 5479.1701013931. The cubic root of 30021305 is about 310.7967882885.

Adding to 30021305 its reverse (50312003), we get a palindrome (80333308).

The spelling of 30021305 in words is "thirty million, twenty-one thousand, three hundred five".