18358842 has 16 divisors (see below), whose sum is σ = 36983520. Its totient is φ = 6075312.

The previous prime is 18358841. The next prime is 18358849. The reversal of 18358842 is 24885381.

It is a self number, because there is not a number n which added to its sum of digits gives 18358842.

It is not an unprimeable number, because it can be changed into a prime (18358841) 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, 10173 + ... + 11840.

It is an arithmetic number, because the mean of its divisors is an integer number (2311470).

Almost surely, 2^18358842 is an apocalyptic number.

18358842 is an abundant number, since it is smaller than the sum of its proper divisors (18624678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18358842 is a wasteful number, since it uses less digits than its factorization.

18358842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22157.

The product of its digits is 61440, while the sum is 39.

The square root of 18358842 is about 4284.7219279669. The cubic root of 18358842 is about 263.8042338853.

The spelling of 18358842 in words is "eighteen million, three hundred fifty-eight thousand, eight hundred forty-two".