18238207 has 16 divisors (see below), whose sum is σ = 20241760. Its totient is φ = 16329600.

The previous prime is 18238193. The next prime is 18238217. The reversal of 18238207 is 70283281.

It is a cyclic number.

It is not a de Polignac number, because 18238207 - 2⁷ = 18238079 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 (18238217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86332 + ... + 86542.

It is an arithmetic number, because the mean of its divisors is an integer number (1265110).

Almost surely, 2^18238207 is an apocalyptic number.

18238207 is a deficient number, since it is larger than the sum of its proper divisors (2003553).

18238207 is a wasteful number, since it uses less digits than its factorization.

18238207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18238207 is about 4270.6213833586. The cubic root of 18238207 is about 263.2251489952.

The spelling of 18238207 in words is "eighteen million, two hundred thirty-eight thousand, two hundred seven".