18182161807 has 2 divisors, whose sum is σ = 18182161808. Its totient is φ = 18182161806.

The previous prime is 18182161763. The next prime is 18182161841. The reversal of 18182161807 is 70816128181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18182161807 - 2¹⁹ = 18181637519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18182161307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9091080903 + 9091080904.

It is an arithmetic number, because the mean of its divisors is an integer number (9091080904).

Almost surely, 2^18182161807 is an apocalyptic number.

18182161807 is a deficient number, since it is larger than the sum of its proper divisors (1).

18182161807 is an equidigital number, since it uses as much as digits as its factorization.

18182161807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 43.

Adding to 18182161807 its reverse (70816128181), we get a palindrome (88998289988).

The spelling of 18182161807 in words is "eighteen billion, one hundred eighty-two million, one hundred sixty-one thousand, eight hundred seven".