18342109 has 8 divisors (see below), whose sum is σ = 19215360. Its totient is φ = 17475216.

The previous prime is 18342101. The next prime is 18342119. The reversal of 18342109 is 90124381.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18342109 - 2³ = 18342101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18342101) 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, 4932 + ... + 7810.

It is an arithmetic number, because the mean of its divisors is an integer number (2401920).

Almost surely, 2^18342109 is an apocalyptic number.

It is an amenable number.

18342109 is a deficient number, since it is larger than the sum of its proper divisors (873251).

18342109 is a wasteful number, since it uses less digits than its factorization.

18342109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 18342109 is about 4282.7688473697. The cubic root of 18342109 is about 263.7240621978.

The spelling of 18342109 in words is "eighteen million, three hundred forty-two thousand, one hundred nine".