30035021 has 4 divisors (see below), whose sum is σ = 30674112. Its totient is φ = 29395932.

The previous prime is 30035011. The next prime is 30035023. The reversal of 30035021 is 12053003.

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: 12053003 = 89 ⋅135427.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30035021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30034987 and 30035005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30035023) 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, 319475 + ... + 319568.

It is an arithmetic number, because the mean of its divisors is an integer number (7668528).

Almost surely, 2^30035021 is an apocalyptic number.

It is an amenable number.

30035021 is a deficient number, since it is larger than the sum of its proper divisors (639091).

30035021 is an equidigital number, since it uses as much as digits as its factorization.

30035021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639090.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 30035021 is about 5480.4216078692. The cubic root of 30035021 is about 310.8441128991.

Adding to 30035021 its reverse (12053003), we get a palindrome (42088024).

The spelling of 30035021 in words is "thirty million, thirty-five thousand, twenty-one".