18838207 has 2 divisors, whose sum is σ = 18838208. Its totient is φ = 18838206.

The previous prime is 18838201. The next prime is 18838213. The reversal of 18838207 is 70283881.

It is a balanced prime because it is at equal distance from previous prime (18838201) and next prime (18838213).

It is a cyclic number.

It is not a de Polignac number, because 18838207 - 2³ = 18838199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18838201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9419103 + 9419104.

It is an arithmetic number, because the mean of its divisors is an integer number (9419104).

Almost surely, 2^18838207 is an apocalyptic number.

18838207 is a deficient number, since it is larger than the sum of its proper divisors (1).

18838207 is an equidigital number, since it uses as much as digits as its factorization.

18838207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 18838207 is about 4340.3003352303. The cubic root of 18838207 is about 266.0805859441.

The spelling of 18838207 in words is "eighteen million, eight hundred thirty-eight thousand, two hundred seven".