30202021 has 4 divisors (see below), whose sum is σ = 31243500. Its totient is φ = 29160544.

The previous prime is 30202019. The next prime is 30202049. The reversal of 30202021 is 12020203.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17313921 + 12888100 = 4161^2 + 3590^2 .

It is not a de Polignac number, because 30202021 - 2¹ = 30202019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30201989 and 30202007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30200021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 520696 + ... + 520753.

It is an arithmetic number, because the mean of its divisors is an integer number (7810875).

Almost surely, 2^30202021 is an apocalyptic number.

It is an amenable number.

30202021 is a deficient number, since it is larger than the sum of its proper divisors (1041479).

30202021 is a wasteful number, since it uses less digits than its factorization.

30202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041478.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 30202021 is about 5495.6365418394. The cubic root of 30202021 is about 311.4191643986.

Adding to 30202021 its reverse (12020203), we get a palindrome (42222224).

It can be divided in two parts, 3020202 and 1, that added together give a palindrome (3020203).

The spelling of 30202021 in words is "thirty million, two hundred two thousand, twenty-one".