18636610642966 has 8 divisors (see below), whose sum is σ = 27958122197280. Its totient is φ = 9317236577208.

The previous prime is 18636610642939. The next prime is 18636610642997. The reversal of 18636610642966 is 66924601663681.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 18636610642898 and 18636610642907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534350341 + ... + 534385216.

It is an arithmetic number, because the mean of its divisors is an integer number (3494765274660).

Almost surely, 2^{18636610642966} is an apocalyptic number.

18636610642966 is a deficient number, since it is larger than the sum of its proper divisors (9321511554314).

18636610642966 is a wasteful number, since it uses less digits than its factorization.

18636610642966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068744278.

The product of its (nonzero) digits is 80621568, while the sum is 64.

The spelling of 18636610642966 in words is "eighteen trillion, six hundred thirty-six billion, six hundred ten million, six hundred forty-two thousand, nine hundred sixty-six".