18542289 has 16 divisors (see below), whose sum is σ = 25242624. Its totient is φ = 12104400.

The previous prime is 18542273. The next prime is 18542297. The reversal of 18542289 is 98224581.

It is not a de Polignac number, because 18542289 - 2⁴ = 18542273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18542269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55854 + ... + 56184.

It is an arithmetic number, because the mean of its divisors is an integer number (1577664).

Almost surely, 2^18542289 is an apocalyptic number.

It is an amenable number.

18542289 is a deficient number, since it is larger than the sum of its proper divisors (6700335).

18542289 is a wasteful number, since it uses less digits than its factorization.

18542289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668.

The product of its digits is 46080, while the sum is 39.

The square root of 18542289 is about 4306.0758237634. The cubic root of 18542289 is about 264.6799934565.

The spelling of 18542289 in words is "eighteen million, five hundred forty-two thousand, two hundred eighty-nine".