18175601819 has 2 divisors, whose sum is σ = 18175601820. Its totient is φ = 18175601818.

The previous prime is 18175601803. The next prime is 18175601827. The reversal of 18175601819 is 91810657181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18175601819 - 2⁴ = 18175601803 is a prime.

It is a super-2 number, since 2×18175601819² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18175601849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9087800909 + 9087800910.

It is an arithmetic number, because the mean of its divisors is an integer number (9087800910).

Almost surely, 2^18175601819 is an apocalyptic number.

18175601819 is a deficient number, since it is larger than the sum of its proper divisors (1).

18175601819 is an equidigital number, since it uses as much as digits as its factorization.

18175601819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 47.

The spelling of 18175601819 in words is "eighteen billion, one hundred seventy-five million, six hundred one thousand, eight hundred nineteen".