18839042 has 4 divisors (see below), whose sum is σ = 28258566. Its totient is φ = 9419520.

The previous prime is 18839011. The next prime is 18839059. The reversal of 18839042 is 24093881.

It is a happy number.

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., 14508481 + 4330561 = 3809^2 + 2081^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18838993 and 18839011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4709759 + ... + 4709762.

Almost surely, 2^18839042 is an apocalyptic number.

18839042 is a deficient number, since it is larger than the sum of its proper divisors (9419524).

18839042 is an equidigital number, since it uses as much as digits as its factorization.

18839042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9419523.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18839042 is about 4340.3965256644. The cubic root of 18839042 is about 266.0845172101.

The spelling of 18839042 in words is "eighteen million, eight hundred thirty-nine thousand, forty-two".