23209042 has 4 divisors (see below), whose sum is σ = 34813566. Its totient is φ = 11604520.

The previous prime is 23209031. The next prime is 23209057. The reversal of 23209042 is 24090232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13039321 + 10169721 = 3611^2 + 3189^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5802259 + ... + 5802262.

Almost surely, 2^23209042 is an apocalyptic number.

23209042 is a deficient number, since it is larger than the sum of its proper divisors (11604524).

23209042 is a wasteful number, since it uses less digits than its factorization.

23209042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11604523.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 23209042 is about 4817.5763616159. The cubic root of 23209042 is about 285.2456771508.

Adding to 23209042 its reverse (24090232), we get a palindrome (47299274).

The spelling of 23209042 in words is "twenty-three million, two hundred nine thousand, forty-two".