18345642 has 16 divisors (see below), whose sum is σ = 41932992. Its totient is φ = 5241600.

The previous prime is 18345581. The next prime is 18345653. The reversal of 18345642 is 24654381.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218359 + ... + 218442.

It is an arithmetic number, because the mean of its divisors is an integer number (2620812).

Almost surely, 2^18345642 is an apocalyptic number.

18345642 is an abundant number, since it is smaller than the sum of its proper divisors (23587350).

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

18345642 is a wasteful number, since it uses less digits than its factorization.

18345642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436813.

The product of its digits is 23040, while the sum is 33.

The square root of 18345642 is about 4283.1812943185. The cubic root of 18345642 is about 263.7409936803.

The spelling of 18345642 in words is "eighteen million, three hundred forty-five thousand, six hundred forty-two".