30338021 has 4 divisors (see below), whose sum is σ = 34672032. Its totient is φ = 26004012.

The previous prime is 30337999. The next prime is 30338023. The reversal of 30338021 is 12083303.

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: 12083303 = 23 ⋅525361.

It is a cyclic number.

It is not a de Polignac number, because 30338021 - 2¹⁴ = 30321637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30337984 and 30338002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30338023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2166995 + ... + 2167008.

It is an arithmetic number, because the mean of its divisors is an integer number (8668008).

Almost surely, 2^30338021 is an apocalyptic number.

It is an amenable number.

30338021 is a deficient number, since it is larger than the sum of its proper divisors (4334011).

30338021 is an equidigital number, since it uses as much as digits as its factorization.

30338021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334010.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30338021 is about 5507.9960965854. The cubic root of 30338021 is about 311.8859057127.

The spelling of 30338021 in words is "thirty million, three hundred thirty-eight thousand, twenty-one".