18351211682 has 8 divisors (see below), whose sum is σ = 27528015900. Its totient is φ = 9175206384.

The previous prime is 18351211633. The next prime is 18351211691. The reversal of 18351211682 is 28611215381.

It can be written as a sum of positive squares in 2 ways, for example, as 16865957161 + 1485254521 = 129869^2 + 38539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 138557 + ... + 236432.

Almost surely, 2^18351211682 is an apocalyptic number.

18351211682 is a deficient number, since it is larger than the sum of its proper divisors (9176804218).

18351211682 is a wasteful number, since it uses less digits than its factorization.

18351211682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399460.

The product of its digits is 23040, while the sum is 38.

The spelling of 18351211682 in words is "eighteen billion, three hundred fifty-one million, two hundred eleven thousand, six hundred eighty-two".