18523852418 has 4 divisors (see below), whose sum is σ = 27785778630. Its totient is φ = 9261926208.

The previous prime is 18523852387. The next prime is 18523852421. The reversal of 18523852418 is 81425832581.

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

It can be written as a sum of positive squares in only one way, i.e., 17071251649 + 1452600769 = 130657^2 + 38113^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4630963103 + ... + 4630963106.

Almost surely, 2^18523852418 is an apocalyptic number.

18523852418 is a deficient number, since it is larger than the sum of its proper divisors (9261926212).

18523852418 is an equidigital number, since it uses as much as digits as its factorization.

18523852418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9261926211.

The product of its digits is 614400, while the sum is 47.

The spelling of 18523852418 in words is "eighteen billion, five hundred twenty-three million, eight hundred fifty-two thousand, four hundred eighteen".