23220442 has 16 divisors (see below), whose sum is σ = 40219200. Its totient is φ = 9848448.

The previous prime is 23220437. The next prime is 23220481. The reversal of 23220442 is 24402232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7192 + ... + 9907.

It is an arithmetic number, because the mean of its divisors is an integer number (2513700).

Almost surely, 2^23220442 is an apocalyptic number.

23220442 is a deficient number, since it is larger than the sum of its proper divisors (16998758).

23220442 is a wasteful number, since it uses less digits than its factorization.

23220442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17205.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 23220442 is about 4818.7593839079. The cubic root of 23220442 is about 285.2923725788.

Adding to 23220442 its reverse (24402232), we get a palindrome (47622674).

The spelling of 23220442 in words is "twenty-three million, two hundred twenty thousand, four hundred forty-two".