18213007 has 2 divisors, whose sum is σ = 18213008. Its totient is φ = 18213006.

The previous prime is 18212993. The next prime is 18213029. The reversal of 18213007 is 70031281.

It is an a-pointer prime, because the next prime (18213029) can be obtained adding 18213007 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18213007 - 2⁷ = 18212879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18213067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9106503 + 9106504.

It is an arithmetic number, because the mean of its divisors is an integer number (9106504).

Almost surely, 2^18213007 is an apocalyptic number.

18213007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18213007 is an equidigital number, since it uses as much as digits as its factorization.

18213007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 18213007 is about 4267.6699731821. The cubic root of 18213007 is about 263.1038590899.

Adding to 18213007 its reverse (70031281), we get a palindrome (88244288).

The spelling of 18213007 in words is "eighteen million, two hundred thirteen thousand, seven".