18825239 has 8 divisors (see below), whose sum is σ = 20357568. Its totient is φ = 17340160.

The previous prime is 18825227. The next prime is 18825241. The reversal of 18825239 is 93252881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18825239 - 2²⁰ = 17776663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18825269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10982 + ... + 12579.

It is an arithmetic number, because the mean of its divisors is an integer number (2544696).

Almost surely, 2^18825239 is an apocalyptic number.

18825239 is a deficient number, since it is larger than the sum of its proper divisors (1532329).

18825239 is a wasteful number, since it uses less digits than its factorization.

18825239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23625.

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

The square root of 18825239 is about 4338.8061722091. The cubic root of 18825239 is about 266.0195163475.

The spelling of 18825239 in words is "eighteen million, eight hundred twenty-five thousand, two hundred thirty-nine".