30050021 has 4 divisors (see below), whose sum is σ = 30088992. Its totient is φ = 30011052.

The previous prime is 30049979. The next prime is 30050047. The reversal of 30050021 is 12005003.

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: 12005003 = 659 ⋅18217.

It is a cyclic number.

It is not a de Polignac number, because 30050021 - 2²² = 25855717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30049984 and 30050011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30050051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18305 + ... + 19878.

It is an arithmetic number, because the mean of its divisors is an integer number (7522248).

Almost surely, 2^30050021 is an apocalyptic number.

It is an amenable number.

30050021 is a deficient number, since it is larger than the sum of its proper divisors (38971).

30050021 is an equidigital number, since it uses as much as digits as its factorization.

30050021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38970.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 30050021 is about 5481.7899448994. The cubic root of 30050021 is about 310.8958512316.

Adding to 30050021 its reverse (12005003), we get a palindrome (42055024).

It can be divided in two parts, 3005002 and 1, that added together give a palindrome (3005003).

The spelling of 30050021 in words is "thirty million, fifty thousand, twenty-one".