18350905 has 8 divisors (see below), whose sum is σ = 23316552. Its totient is φ = 13817088.

The previous prime is 18350897. The next prime is 18350909. The reversal of 18350905 is 50905381.

It can be written as a sum of positive squares in 4 ways, for example, as 2005056 + 16345849 = 1416^2 + 4043^2 .

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 18350905 - 2³ = 18350897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18350909) 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, 107862 + ... + 108031.

It is an arithmetic number, because the mean of its divisors is an integer number (2914569).

Almost surely, 2^18350905 is an apocalyptic number.

It is an amenable number.

18350905 is a deficient number, since it is larger than the sum of its proper divisors (4965647).

18350905 is a wasteful number, since it uses less digits than its factorization.

18350905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215915.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 18350905 is about 4283.7956300459. The cubic root of 18350905 is about 263.7662119517.

The spelling of 18350905 in words is "eighteen million, three hundred fifty thousand, nine hundred five".