30023021 has 16 divisors (see below), whose sum is σ = 37100160. Its totient is φ = 23716800.

The previous prime is 30023017. The next prime is 30023039. The reversal of 30023021 is 12032003.

It is a cyclic number.

It is not a de Polignac number, because 30023021 - 2² = 30023017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30022993 and 30023011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30023051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1871 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (2318760).

Almost surely, 2^30023021 is an apocalyptic number.

It is an amenable number.

30023021 is a deficient number, since it is larger than the sum of its proper divisors (7077139).

30023021 is a wasteful number, since it uses less digits than its factorization.

30023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 30023021 is about 5479.3266922132. The cubic root of 30023021 is about 310.8027098291.

Adding to 30023021 its reverse (12032003), we get a palindrome (42055024).

The spelling of 30023021 in words is "thirty million, twenty-three thousand, twenty-one".