18659286801 has 9 divisors (see below), whose sum is σ = 26952895099. Its totient is φ = 12439251336.

The previous prime is 18659286781. The next prime is 18659286817. The reversal of 18659286801 is 10868295681.

It is a happy number.

The square root of 18659286801 is 136599.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9265025025 + 9394261776 = 96255^2 + 96924^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 18659286801 - 2⁵ = 18659286769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18659286871) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 387031 + ... + 432563.

Almost surely, 2^18659286801 is an apocalyptic number.

18659286801 is the 136599-th square number.

18659286801 is the 68300-th centered octagonal number.

It is an amenable number.

18659286801 is a deficient number, since it is larger than the sum of its proper divisors (8293608298).

18659286801 is an frugal number, since it uses more digits than its factorization.

18659286801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91072 (or 45536 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 18659286801 in words is "eighteen billion, six hundred fifty-nine million, two hundred eighty-six thousand, eight hundred one".