18932042 has 4 divisors (see below), whose sum is σ = 28398066. Its totient is φ = 9466020.

The previous prime is 18932029. The next prime is 18932047. The reversal of 18932042 is 24023981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24023981 = 911 ⋅26371.

It can be written as a sum of positive squares in only one way, i.e., 18931201 + 841 = 4351^2 + 29^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18931996 and 18932014.

It is not an unprimeable number, because it can be changed into a prime (18932047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4733009 + ... + 4733012.

Almost surely, 2^18932042 is an apocalyptic number.

18932042 is a deficient number, since it is larger than the sum of its proper divisors (9466024).

18932042 is an equidigital number, since it uses as much as digits as its factorization.

18932042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9466023.

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

The square root of 18932042 is about 4351.0966433762. The cubic root of 18932042 is about 266.5216458006.

The spelling of 18932042 in words is "eighteen million, nine hundred thirty-two thousand, forty-two".