18783864163 has 8 divisors (see below), whose sum is σ = 18849652928. Its totient is φ = 18718185024.

The previous prime is 18783864133. The next prime is 18783864173. The reversal of 18783864163 is 36146838781.

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-18783864163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18783864103) 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, 323695 + ... + 377287.

It is an arithmetic number, because the mean of its divisors is an integer number (2356206616).

Almost surely, 2^18783864163 is an apocalyptic number.

18783864163 is a deficient number, since it is larger than the sum of its proper divisors (65788765).

18783864163 is an equidigital number, since it uses as much as digits as its factorization.

18783864163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54813.

The product of its digits is 4644864, while the sum is 55.

The spelling of 18783864163 in words is "eighteen billion, seven hundred eighty-three million, eight hundred sixty-four thousand, one hundred sixty-three".