18542859 has 4 divisors (see below), whose sum is σ = 24723816. Its totient is φ = 12361904.

The previous prime is 18542851. The next prime is 18542873. The reversal of 18542859 is 95824581.

It is a happy number.

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 18542859 - 2³ = 18542851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18542859.

It is not an unprimeable number, because it can be changed into a prime (18542851) 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, 3090474 + ... + 3090479.

It is an arithmetic number, because the mean of its divisors is an integer number (6180954).

Almost surely, 2^18542859 is an apocalyptic number.

18542859 is a deficient number, since it is larger than the sum of its proper divisors (6180957).

18542859 is an equidigital number, since it uses as much as digits as its factorization.

18542859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180956.

The product of its digits is 115200, while the sum is 42.

The square root of 18542859 is about 4306.1420088056. The cubic root of 18542859 is about 264.6827055641.

The spelling of 18542859 in words is "eighteen million, five hundred forty-two thousand, eight hundred fifty-nine".