30180021 has 8 divisors (see below), whose sum is σ = 40297440. Its totient is φ = 20091312.

The previous prime is 30180001. The next prime is 30180047. The reversal of 30180021 is 12008103.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30180021 - 2⁹ = 30179509 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30180001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4590 + ... + 9023.

It is an arithmetic number, because the mean of its divisors is an integer number (5037180).

Almost surely, 2^30180021 is an apocalyptic number.

It is an amenable number.

30180021 is a deficient number, since it is larger than the sum of its proper divisors (10117419).

30180021 is a wasteful number, since it uses less digits than its factorization.

30180021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14355.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 30180021 is about 5493.6345892314. The cubic root of 30180021 is about 311.3435305436.

Adding to 30180021 its reverse (12008103), we get a palindrome (42188124).

The spelling of 30180021 in words is "thirty million, one hundred eighty thousand, twenty-one".