18342320 has 40 divisors (see below), whose sum is σ = 45157824. Its totient is φ = 6904832.

The previous prime is 18342319. The next prime is 18342341. The reversal of 18342320 is 2324381.

It is a tau number, because it is divible by the number of its divisors (40).

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, 5384 + ... + 8103.

Almost surely, 2^18342320 is an apocalyptic number.

18342320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18342320 is an abundant number, since it is smaller than the sum of its proper divisors (26815504).

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

18342320 is a wasteful number, since it uses less digits than its factorization.

18342320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13517 (or 13511 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 18342320 is about 4282.7934808954. The cubic root of 18342320 is about 263.7250734512.

The spelling of 18342320 in words is "eighteen million, three hundred forty-two thousand, three hundred twenty".