18177344143 has 6 divisors (see below), whose sum is σ = 21145073856. Its totient is φ = 15580580652.

The previous prime is 18177344123. The next prime is 18177344149. The reversal of 18177344143 is 34144377181.

It is not a de Polignac number, because 18177344143 - 2⁵ = 18177344111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18177344143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18177344149) 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 5 ways as a sum of consecutive naturals, for example, 185483055 + ... + 185483152.

It is an arithmetic number, because the mean of its divisors is an integer number (3524178976).

Almost surely, 2^18177344143 is an apocalyptic number.

18177344143 is a deficient number, since it is larger than the sum of its proper divisors (2967729713).

18177344143 is an equidigital number, since it uses as much as digits as its factorization.

18177344143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370966221 (or 370966214 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The spelling of 18177344143 in words is "eighteen billion, one hundred seventy-seven million, three hundred forty-four thousand, one hundred forty-three".