30432021 has 8 divisors (see below), whose sum is σ = 41132160. Its totient is φ = 20009952.

The previous prime is 30432011. The next prime is 30432029. The reversal of 30432021 is 12023403.

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

It is not a de Polignac number, because 30432021 - 2⁶ = 30431957 is a prime.

It is a super-2 number, since 2×30432021² = 1852215804288882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30432029) 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, 69261 + ... + 69698.

It is an arithmetic number, because the mean of its divisors is an integer number (5141520).

Almost surely, 2^30432021 is an apocalyptic number.

It is an amenable number.

30432021 is a deficient number, since it is larger than the sum of its proper divisors (10700139).

30432021 is a wasteful number, since it uses less digits than its factorization.

30432021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139035.

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

The square root of 30432021 is about 5516.5225459523. The cubic root of 30432021 is about 312.2076916773.

Adding to 30432021 its reverse (12023403), we get a palindrome (42455424).

The spelling of 30432021 in words is "thirty million, four hundred thirty-two thousand, twenty-one".