18050042 has 4 divisors (see below), whose sum is σ = 27075066. Its totient is φ = 9025020.

The previous prime is 18050041. The next prime is 18050059. The reversal of 18050042 is 24005081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24005081 = 167 ⋅143743.

It can be written as a sum of positive squares in only one way, i.e., 16008001 + 2042041 = 4001^2 + 1429^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18049996 and 18050023.

It is not an unprimeable number, because it can be changed into a prime (18050041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4512509 + ... + 4512512.

Almost surely, 2^18050042 is an apocalyptic number.

18050042 is a deficient number, since it is larger than the sum of its proper divisors (9025024).

18050042 is an equidigital number, since it uses as much as digits as its factorization.

18050042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9025023.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 18050042 is about 4248.5341001338. The cubic root of 18050042 is about 262.3167797795.

The spelling of 18050042 in words is "eighteen million, fifty thousand, forty-two".