30023020021 has 16 divisors (see below), whose sum is σ = 30976743168. Its totient is φ = 29080278400.

The previous prime is 30023020019. The next prime is 30023020043. The reversal of 30023020021 is 12002032003.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 30023020021 - 2¹ = 30023020019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30023019983 and 30023020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30023020061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7057131 + ... + 7061383.

It is an arithmetic number, because the mean of its divisors is an integer number (1936046448).

Almost surely, 2^30023020021 is an apocalyptic number.

It is an amenable number.

30023020021 is a deficient number, since it is larger than the sum of its proper divisors (953723147).

30023020021 is a wasteful number, since it uses less digits than its factorization.

30023020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 30023020021 its reverse (12002032003), we get a palindrome (42025052024).

The spelling of 30023020021 in words is "thirty billion, twenty-three million, twenty thousand, twenty-one".