23540042 has 4 divisors (see below), whose sum is σ = 35310066. Its totient is φ = 11770020.

The previous prime is 23540039. The next prime is 23540059. The reversal of 23540042 is 24004532.

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., 22477081 + 1062961 = 4741^2 + 1031^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23539996 and 23540023.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5885009 + ... + 5885012.

Almost surely, 2^23540042 is an apocalyptic number.

23540042 is a deficient number, since it is larger than the sum of its proper divisors (11770024).

23540042 is a wasteful number, since it uses less digits than its factorization.

23540042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11770023.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 23540042 is about 4851.8081165685. The cubic root of 23540042 is about 286.5953091425.

Adding to 23540042 its reverse (24004532), we get a palindrome (47544574).

The spelling of 23540042 in words is "twenty-three million, five hundred forty thousand, forty-two".