23213642 has 4 divisors (see below), whose sum is σ = 34820466. Its totient is φ = 11606820.

The previous prime is 23213639. The next prime is 23213651. The reversal of 23213642 is 24631232.

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., 21911761 + 1301881 = 4681^2 + 1141^2 .

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 as a sum of consecutive naturals, namely, 5803409 + ... + 5803412.

Almost surely, 2^23213642 is an apocalyptic number.

23213642 is a deficient number, since it is larger than the sum of its proper divisors (11606824).

23213642 is a wasteful number, since it uses less digits than its factorization.

23213642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11606823.

The product of its digits is 1728, while the sum is 23.

The square root of 23213642 is about 4818.0537564456. The cubic root of 23213642 is about 285.2645210053.

Adding to 23213642 its reverse (24631232), we get a palindrome (47844874).

The spelling of 23213642 in words is "twenty-three million, two hundred thirteen thousand, six hundred forty-two".