18328907 has 8 divisors (see below), whose sum is σ = 20251296. Its totient is φ = 16500352.

The previous prime is 18328903. The next prime is 18328943. The reversal of 18328907 is 70982381.

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

It is a cyclic number.

It is not a de Polignac number, because 18328907 - 2² = 18328903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18328903) 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, 23048 + ... + 23829.

It is an arithmetic number, because the mean of its divisors is an integer number (2531412).

Almost surely, 2^18328907 is an apocalyptic number.

18328907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18328907 is a deficient number, since it is larger than the sum of its proper divisors (1922389).

18328907 is a wasteful number, since it uses less digits than its factorization.

18328907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46917.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 18328907 is about 4281.2272773120. The cubic root of 18328907 is about 263.6607739333.

The spelling of 18328907 in words is "eighteen million, three hundred twenty-eight thousand, nine hundred seven".