18885986331602 has 16 divisors (see below), whose sum is σ = 30564523899672. Its totient is φ = 8700497038080.

The previous prime is 18885986331581. The next prime is 18885986331677. The reversal of 18885986331602 is 20613368958881.

It is a Cunningham number, because it is equal to 4345801²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7503331686841 + 11382654644761 = 2739221^2 + 3373819^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671320583 + ... + 671348714.

Almost surely, 2^{18885986331602} is an apocalyptic number.

18885986331602 is a deficient number, since it is larger than the sum of its proper divisors (11678537568070).

18885986331602 is a wasteful number, since it uses less digits than its factorization.

18885986331602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342669853.

The product of its (nonzero) digits is 119439360, while the sum is 68.

The spelling of 18885986331602 in words is "eighteen trillion, eight hundred eighty-five billion, nine hundred eighty-six million, three hundred thirty-one thousand, six hundred two".