18087342 has 64 divisors (see below), whose sum is σ = 45018624. Its totient is φ = 4717440.

The previous prime is 18087319. The next prime is 18087343. The reversal of 18087342 is 24378081.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85617 + ... + 85827.

It is an arithmetic number, because the mean of its divisors is an integer number (703416).

Almost surely, 2^18087342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18087342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22509312).

18087342 is an abundant number, since it is smaller than the sum of its proper divisors (26931282).

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

18087342 is a wasteful number, since it uses less digits than its factorization.

18087342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 18087342 is about 4252.9215840408. The cubic root of 18087342 is about 262.4973460049.

The spelling of 18087342 in words is "eighteen million, eighty-seven thousand, three hundred forty-two".