30021535079 has 4 divisors (see below), whose sum is σ = 30040335384. Its totient is φ = 30002734776.

The previous prime is 30021535073. The next prime is 30021535081. The reversal of 30021535079 is 97053512003.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30021535079 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 (30021535073) 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, 9397757 + ... + 9400950.

It is an arithmetic number, because the mean of its divisors is an integer number (7510083846).

Almost surely, 2^30021535079 is an apocalyptic number.

30021535079 is a deficient number, since it is larger than the sum of its proper divisors (18800305).

30021535079 is a wasteful number, since it uses less digits than its factorization.

30021535079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18800304.

The product of its (nonzero) digits is 28350, while the sum is 35.

The spelling of 30021535079 in words is "thirty billion, twenty-one million, five hundred thirty-five thousand, seventy-nine".