23190842 has 4 divisors (see below), whose sum is σ = 34786266. Its totient is φ = 11595420.

The previous prime is 23190841. The next prime is 23190847. The reversal of 23190842 is 24809132.

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., 18826921 + 4363921 = 4339^2 + 2089^2 .

It is not an unprimeable number, because it can be changed into a prime (23190841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5797709 + ... + 5797712.

Almost surely, 2^23190842 is an apocalyptic number.

23190842 is a deficient number, since it is larger than the sum of its proper divisors (11595424).

23190842 is a wasteful number, since it uses less digits than its factorization.

23190842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11595423.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 23190842 is about 4815.6870745513. The cubic root of 23190842 is about 285.1710966069.

Adding to 23190842 its reverse (24809132), we get a palindrome (47999974).

The spelling of 23190842 in words is "twenty-three million, one hundred ninety thousand, eight hundred forty-two".