18852409 has 4 divisors (see below), whose sum is σ = 18902016. Its totient is φ = 18802804.

The previous prime is 18852401. The next prime is 18852413. The reversal of 18852409 is 90425881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18852409 - 2³ = 18852401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18852401) 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, 24229 + ... + 24994.

It is an arithmetic number, because the mean of its divisors is an integer number (4725504).

Almost surely, 2^18852409 is an apocalyptic number.

It is an amenable number.

18852409 is a deficient number, since it is larger than the sum of its proper divisors (49607).

18852409 is an equidigital number, since it uses as much as digits as its factorization.

18852409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49606.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 18852409 is about 4341.9360888894. The cubic root of 18852409 is about 266.1474346142.

The spelling of 18852409 in words is "eighteen million, eight hundred fifty-two thousand, four hundred nine".