18214875577 has 4 divisors (see below), whose sum is σ = 18216899316. Its totient is φ = 18212851840.

The previous prime is 18214875529. The next prime is 18214875583. The reversal of 18214875577 is 77557841281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10923594256 + 7291281321 = 104516^2 + 85389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18214875577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18214875517) 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 in 3 ways as a sum of consecutive naturals, for example, 998308 + ... + 1016389.

It is an arithmetic number, because the mean of its divisors is an integer number (4554224829).

Almost surely, 2^18214875577 is an apocalyptic number.

It is an amenable number.

18214875577 is a deficient number, since it is larger than the sum of its proper divisors (2023739).

18214875577 is an equidigital number, since it uses as much as digits as its factorization.

18214875577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023738.

The product of its digits is 4390400, while the sum is 55.

The spelling of 18214875577 in words is "eighteen billion, two hundred fourteen million, eight hundred seventy-five thousand, five hundred seventy-seven".