23021330 has 16 divisors (see below), whose sum is σ = 41503320. Its totient is φ = 9194112.

The previous prime is 23021291. The next prime is 23021333. The reversal of 23021330 is 3312032.

It can be written as a sum of positive squares in 4 ways, for example, as 15342889 + 7678441 = 3917^2 + 2771^2 .

It is not an unprimeable number, because it can be changed into a prime (23021333) 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 7 ways as a sum of consecutive naturals, for example, 6902 + ... + 9678.

Almost surely, 2^23021330 is an apocalyptic number.

23021330 is a deficient number, since it is larger than the sum of its proper divisors (18481990).

23021330 is a wasteful number, since it uses less digits than its factorization.

23021330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 23021330 is about 4798.0548141929. The cubic root of 23021330 is about 284.4745834063.

Adding to 23021330 its reverse (3312032), we get a palindrome (26333362).

The spelling of 23021330 in words is "twenty-three million, twenty-one thousand, three hundred thirty".