30848021 has 4 divisors (see below), whose sum is σ = 30860544. Its totient is φ = 30835500.

The previous prime is 30848017. The next prime is 30848053. The reversal of 30848021 is 12084803.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12084803 = 1811 ⋅6673.

It is a cyclic number.

It is not a de Polignac number, because 30848021 - 2² = 30848017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30848621) 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, 1205 + ... + 7946.

It is an arithmetic number, because the mean of its divisors is an integer number (7715136).

Almost surely, 2^30848021 is an apocalyptic number.

It is an amenable number.

30848021 is a deficient number, since it is larger than the sum of its proper divisors (12523).

30848021 is an equidigital number, since it uses as much as digits as its factorization.

30848021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12522.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 30848021 is about 5554.0994769629. The cubic root of 30848021 is about 313.6238650026.

It can be divided in two parts, 3084802 and 1, that added together give a palindrome (3084803).

The spelling of 30848021 in words is "thirty million, eight hundred forty-eight thousand, twenty-one".