18661630343 has 8 divisors (see below), whose sum is σ = 18796474368. Its totient is φ = 18527243544.

The previous prime is 18661630333. The next prime is 18661630357. The reversal of 18661630343 is 34303616681.

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 18661630343 - 2⁴ = 18661630327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18661630343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18661630333) 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, 32171 + ... + 195852.

It is an arithmetic number, because the mean of its divisors is an integer number (2349559296).

Almost surely, 2^18661630343 is an apocalyptic number.

18661630343 is a deficient number, since it is larger than the sum of its proper divisors (134844025).

18661630343 is a wasteful number, since it uses less digits than its factorization.

18661630343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228613.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 18661630343 in words is "eighteen billion, six hundred sixty-one million, six hundred thirty thousand, three hundred forty-three".