18162007 has 2 divisors, whose sum is σ = 18162008. Its totient is φ = 18162006.

The previous prime is 18161993. The next prime is 18162031. The reversal of 18162007 is 70026181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18162007 - 2¹¹ = 18159959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18162037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9081003 + 9081004.

It is an arithmetic number, because the mean of its divisors is an integer number (9081004).

Almost surely, 2^18162007 is an apocalyptic number.

18162007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18162007 is an equidigital number, since it uses as much as digits as its factorization.

18162007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 18162007 is about 4261.6906269695. The cubic root of 18162007 is about 262.8580486652.

Adding to 18162007 its reverse (70026181), we get a palindrome (88188188).

The spelling of 18162007 in words is "eighteen million, one hundred sixty-two thousand, seven".