30202020021 has 16 divisors (see below), whose sum is σ = 42643666944. Its totient is φ = 18947833344.

The previous prime is 30202020011. The next prime is 30202020049. The reversal of 30202020021 is 12002020203.

It is not a de Polignac number, because 30202020021 - 2¹⁷ = 30201888949 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30202019979 and 30202020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30202020011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410380 + ... + 478346.

It is an arithmetic number, because the mean of its divisors is an integer number (2665229184).

Almost surely, 2^30202020021 is an apocalyptic number.

It is an amenable number.

30202020021 is a deficient number, since it is larger than the sum of its proper divisors (12441646923).

30202020021 is a wasteful number, since it uses less digits than its factorization.

30202020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76700.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 30202020021 its reverse (12002020203), we get a palindrome (42204040224).

The spelling of 30202020021 in words is "thirty billion, two hundred two million, twenty thousand, twenty-one".