18555942 has 32 divisors (see below), whose sum is σ = 39679200. Its totient is φ = 5764608.

The previous prime is 18555931. The next prime is 18555947. The reversal of 18555942 is 24955581.

Its product of digits (72000) is a multiple of the sum of its prime divisors (1800).

It is a self number, because there is not a number n which added to its sum of digits gives 18555942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18555947) 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, 10284 + ... + 11952.

It is an arithmetic number, because the mean of its divisors is an integer number (1239975).

Almost surely, 2^18555942 is an apocalyptic number.

18555942 is an abundant number, since it is smaller than the sum of its proper divisors (21123258).

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

18555942 is a wasteful number, since it uses less digits than its factorization.

18555942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800.

The product of its digits is 72000, while the sum is 39.

The square root of 18555942 is about 4307.6608501599. The cubic root of 18555942 is about 264.7449402991.

The spelling of 18555942 in words is "eighteen million, five hundred fifty-five thousand, nine hundred forty-two".