23009842 has 4 divisors (see below), whose sum is σ = 34514766. Its totient is φ = 11504920.

The previous prime is 23009839. The next prime is 23009873. The reversal of 23009842 is 24890032.

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., 12453841 + 10556001 = 3529^2 + 3249^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23009842.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5752459 + ... + 5752462.

Almost surely, 2^23009842 is an apocalyptic number.

23009842 is a deficient number, since it is larger than the sum of its proper divisors (11504924).

23009842 is a wasteful number, since it uses less digits than its factorization.

23009842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11504923.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 23009842 is about 4796.8575129974. The cubic root of 23009842 is about 284.4272564597.

Adding to 23009842 its reverse (24890032), we get a palindrome (47899874).

The spelling of 23009842 in words is "twenty-three million, nine thousand, eight hundred forty-two".