18250909 has 8 divisors (see below), whose sum is σ = 18906368. Its totient is φ = 17599680.

The previous prime is 18250907. The next prime is 18250919. The reversal of 18250909 is 90905281.

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 18250909 - 2¹ = 18250907 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 (18250901) 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, 9574 + ... + 11320.

It is an arithmetic number, because the mean of its divisors is an integer number (2363296).

Almost surely, 2^18250909 is an apocalyptic number.

It is an amenable number.

18250909 is a deficient number, since it is larger than the sum of its proper divisors (655459).

18250909 is a wasteful number, since it uses less digits than its factorization.

18250909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 18250909 is about 4272.1082617368. The cubic root of 18250909 is about 263.2862425364.

The spelling of 18250909 in words is "eighteen million, two hundred fifty thousand, nine hundred nine".