18612864230663 has 4 divisors (see below), whose sum is σ = 18613151562048. Its totient is φ = 18612576899280.

The previous prime is 18612864230651. The next prime is 18612864230677. The reversal of 18612864230663 is 36603246821681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18612864230663 - 2⁶ = 18612864230599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18612864230599 and 18612864230608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18612864230633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143568503 + ... + 143698088.

It is an arithmetic number, because the mean of its divisors is an integer number (4653287890512).

Almost surely, 2^{18612864230663} is an apocalyptic number.

18612864230663 is a deficient number, since it is larger than the sum of its proper divisors (287331385).

18612864230663 is an equidigital number, since it uses as much as digits as its factorization.

18612864230663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287331384.

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 18612864230663 in words is "eighteen trillion, six hundred twelve billion, eight hundred sixty-four million, two hundred thirty thousand, six hundred sixty-three".