18238007 has 2 divisors, whose sum is σ = 18238008. Its totient is φ = 18238006.

The previous prime is 18238001. The next prime is 18238009. The reversal of 18238007 is 70083281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18238007 - 2¹⁰ = 18236983 is a prime.

Together with 18238009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18238001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9119003 + 9119004.

It is an arithmetic number, because the mean of its divisors is an integer number (9119004).

Almost surely, 2^18238007 is an apocalyptic number.

18238007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18238007 is an equidigital number, since it uses as much as digits as its factorization.

18238007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 18238007 is about 4270.5979674982. The cubic root of 18238007 is about 263.2241868169.

The spelling of 18238007 in words is "eighteen million, two hundred thirty-eight thousand, seven".