23420442 has 32 divisors (see below), whose sum is σ = 47900160. Its totient is φ = 7632560.

The previous prime is 23420437. The next prime is 23420443. The reversal of 23420442 is 24402432.

It is not an unprimeable number, because it can be changed into a prime (23420443) 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, 65059 + ... + 65417.

It is an arithmetic number, because the mean of its divisors is an integer number (1496880).

Almost surely, 2^23420442 is an apocalyptic number.

23420442 is an abundant number, since it is smaller than the sum of its proper divisors (24479718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23420442 is a wasteful number, since it uses less digits than its factorization.

23420442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 23420442 is about 4839.4671194254. The cubic root of 23420442 is about 286.1091161062.

Adding to 23420442 its reverse (24402432), we get a palindrome (47822874).

The spelling of 23420442 in words is "twenty-three million, four hundred twenty thousand, four hundred forty-two".