30420213 has 4 divisors (see below), whose sum is σ = 40560288. Its totient is φ = 20280140.

The previous prime is 30420209. The next prime is 30420227. The reversal of 30420213 is 31202403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31202403 = 3 ⋅10400801.

It is a cyclic number.

It is not a de Polignac number, because 30420213 - 2² = 30420209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30420192 and 30420201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420113) 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, 5070033 + ... + 5070038.

It is an arithmetic number, because the mean of its divisors is an integer number (10140072).

Almost surely, 2^30420213 is an apocalyptic number.

It is an amenable number.

30420213 is a deficient number, since it is larger than the sum of its proper divisors (10140075).

30420213 is a wasteful number, since it uses less digits than its factorization.

30420213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10140074.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 30420213 is about 5515.4522026757. The cubic root of 30420213 is about 312.1673063067.

Adding to 30420213 its reverse (31202403), we get a palindrome (61622616).

The spelling of 30420213 in words is "thirty million, four hundred twenty thousand, two hundred thirteen".