18180842793 has 16 divisors (see below), whose sum is σ = 24826554816. Its totient is φ = 11831270400.

The previous prime is 18180842791. The next prime is 18180842903. The reversal of 18180842793 is 39724808181.

It is not a de Polignac number, because 18180842793 - 2¹ = 18180842791 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18180842791) 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 in 15 ways as a sum of consecutive naturals, for example, 406683 + ... + 449168.

It is an arithmetic number, because the mean of its divisors is an integer number (1551659676).

Almost surely, 2^18180842793 is an apocalyptic number.

It is an amenable number.

18180842793 is a deficient number, since it is larger than the sum of its proper divisors (6645712023).

18180842793 is an equidigital number, since it uses as much as digits as its factorization.

18180842793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856024.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 18180842793 in words is "eighteen billion, one hundred eighty million, eight hundred forty-two thousand, seven hundred ninety-three".