18218159602 has 8 divisors (see below), whose sum is σ = 27333042012. Its totient is φ = 9107145600.

The previous prime is 18218159569. The next prime is 18218159621. The reversal of 18218159602 is 20695181281.

It can be written as a sum of positive squares in 2 ways, for example, as 18178859241 + 39300361 = 134829^2 + 6269^2 .

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955299 + ... + 974182.

Almost surely, 2^18218159602 is an apocalyptic number.

18218159602 is a deficient number, since it is larger than the sum of its proper divisors (9114882410).

18218159602 is a wasteful number, since it uses less digits than its factorization.

18218159602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934204.

The product of its (nonzero) digits is 69120, while the sum is 43.

The spelling of 18218159602 in words is "eighteen billion, two hundred eighteen million, one hundred fifty-nine thousand, six hundred two".