34320021 has 16 divisors (see below), whose sum is σ = 47770560. Its totient is φ = 21889280.

The previous prime is 34320019. The next prime is 34320029. The reversal of 34320021 is 12002343.

34320021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 34320021 - 2¹ = 34320019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34320029) 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 15 ways as a sum of consecutive naturals, for example, 8086 + ... + 11576.

It is an arithmetic number, because the mean of its divisors is an integer number (2985660).

Almost surely, 2^34320021 is an apocalyptic number.

It is an amenable number.

34320021 is a deficient number, since it is larger than the sum of its proper divisors (13450539).

34320021 is a wasteful number, since it uses less digits than its factorization.

34320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636.

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

The square root of 34320021 is about 5858.3291986709. The cubic root of 34320021 is about 324.9744232338.

Adding to 34320021 its reverse (12002343), we get a palindrome (46322364).

The spelling of 34320021 in words is "thirty-four million, three hundred twenty thousand, twenty-one".