18630171641 has 8 divisors (see below), whose sum is σ = 18758589000. Its totient is φ = 18501799680.

The previous prime is 18630171629. The next prime is 18630171643. The reversal of 18630171641 is 14617103681.

It can be written as a sum of positive squares in 4 ways, for example, as 6464964025 + 12165207616 = 80405^2 + 110296^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18630171641 - 2⁶ = 18630171577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18630171595 and 18630171604.

It is not an unprimeable number, because it can be changed into a prime (18630171643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458161 + ... + 1470881.

It is an arithmetic number, because the mean of its divisors is an integer number (2344823625).

Almost surely, 2^18630171641 is an apocalyptic number.

It is an amenable number.

18630171641 is a deficient number, since it is larger than the sum of its proper divisors (128417359).

18630171641 is a wasteful number, since it uses less digits than its factorization.

18630171641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22699.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 18630171641 in words is "eighteen billion, six hundred thirty million, one hundred seventy-one thousand, six hundred forty-one".