18666049963 has 8 divisors (see below), whose sum is σ = 21560785200. Its totient is φ = 15970951680.

The previous prime is 18666049891. The next prime is 18666049991. The reversal of 18666049963 is 36994066681.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18666049963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18666049898 and 18666049907.

It is not an unprimeable number, because it can be changed into a prime (18666046963) 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, 49909038 + ... + 49909411.

It is an arithmetic number, because the mean of its divisors is an integer number (2695098150).

Almost surely, 2^18666049963 is an apocalyptic number.

18666049963 is a deficient number, since it is larger than the sum of its proper divisors (2894735237).

18666049963 is a wasteful number, since it uses less digits than its factorization.

18666049963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99818477.

The product of its (nonzero) digits is 10077696, while the sum is 58.

The spelling of 18666049963 in words is "eighteen billion, six hundred sixty-six million, forty-nine thousand, nine hundred sixty-three".