18442529 has 8 divisors (see below), whose sum is σ = 21232128. Its totient is φ = 15691680.

The previous prime is 18442511. The next prime is 18442531. The reversal of 18442529 is 92524481.

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 18442529 - 2²⁰ = 17393953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18442129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8657 + ... + 10574.

It is an arithmetic number, because the mean of its divisors is an integer number (2654016).

Almost surely, 2^18442529 is an apocalyptic number.

It is an amenable number.

18442529 is a deficient number, since it is larger than the sum of its proper divisors (2789599).

18442529 is a wasteful number, since it uses less digits than its factorization.

18442529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19375.

The product of its digits is 23040, while the sum is 35.

The square root of 18442529 is about 4294.4765688032. The cubic root of 18442529 is about 264.2044683581.

The spelling of 18442529 in words is "eighteen million, four hundred forty-two thousand, five hundred twenty-nine".