18869234 has 4 divisors (see below), whose sum is σ = 28303854. Its totient is φ = 9434616.

The previous prime is 18869209. The next prime is 18869237. The reversal of 18869234 is 43296881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43296881 = 6211 ⋅6971.

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 7546009 = 3365^2 + 2747^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18869191 and 18869200.

It is not an unprimeable number, because it can be changed into a prime (18869237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4717307 + ... + 4717310.

Almost surely, 2^18869234 is an apocalyptic number.

18869234 is a deficient number, since it is larger than the sum of its proper divisors (9434620).

18869234 is an equidigital number, since it uses as much as digits as its factorization.

18869234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9434619.

The product of its digits is 82944, while the sum is 41.

The square root of 18869234 is about 4343.8731565275. The cubic root of 18869234 is about 266.2265862870.

The spelling of 18869234 in words is "eighteen million, eight hundred sixty-nine thousand, two hundred thirty-four".