18818388002 has 6 divisors (see below), whose sum is σ = 28227873009. Its totient is φ = 9409097000.

The previous prime is 18818387989. The next prime is 18818388019. The reversal of 18818388002 is 20088381881.

It can be written as a sum of positive squares in 2 ways, for example, as 17519434321 + 1298953681 = 132361^2 + 36041^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=97001.

It is a Duffinian number.

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 in 2 ways as a sum of consecutive naturals, for example, 145502 + ... + 242502.

Almost surely, 2^18818388002 is an apocalyptic number.

18818388002 is a deficient number, since it is larger than the sum of its proper divisors (9409485007).

18818388002 is an frugal number, since it uses more digits than its factorization.

18818388002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194004 (or 97003 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 47.

The spelling of 18818388002 in words is "eighteen billion, eight hundred eighteen million, three hundred eighty-eight thousand, two".