18852239 has 4 divisors (see below), whose sum is σ = 21545424. Its totient is φ = 16159056.

The previous prime is 18852221. The next prime is 18852271. The reversal of 18852239 is 93225881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18852239 - 2¹² = 18848143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18852209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1346582 + ... + 1346595.

It is an arithmetic number, because the mean of its divisors is an integer number (5386356).

Almost surely, 2^18852239 is an apocalyptic number.

18852239 is a deficient number, since it is larger than the sum of its proper divisors (2693185).

18852239 is an equidigital number, since it uses as much as digits as its factorization.

18852239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693184.

The product of its digits is 34560, while the sum is 38.

The square root of 18852239 is about 4341.9165123249. The cubic root of 18852239 is about 266.1466346245.

It can be divided in two parts, 18852 and 239, that added together give a palindrome (19091).

The spelling of 18852239 in words is "eighteen million, eight hundred fifty-two thousand, two hundred thirty-nine".