30027021 has 4 divisors (see below), whose sum is σ = 40036032. Its totient is φ = 20018012.

The previous prime is 30027013. The next prime is 30027059. The reversal of 30027021 is 12072003.

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: 12072003 = 3 ⋅4024001.

It is a cyclic number.

It is not a de Polignac number, because 30027021 - 2³ = 30027013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30027001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5004501 + ... + 5004506.

It is an arithmetic number, because the mean of its divisors is an integer number (10009008).

Almost surely, 2^30027021 is an apocalyptic number.

It is an amenable number.

30027021 is a deficient number, since it is larger than the sum of its proper divisors (10009011).

30027021 is a wasteful number, since it uses less digits than its factorization.

30027021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009010.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 30027021 is about 5479.6916884073. The cubic root of 30027021 is about 310.8165120781.

Adding to 30027021 its reverse (12072003), we get a palindrome (42099024).

The spelling of 30027021 in words is "thirty million, twenty-seven thousand, twenty-one".