18780163111 has 4 divisors (see below), whose sum is σ = 18812711632. Its totient is φ = 18747614592.

The previous prime is 18780163081. The next prime is 18780163139. The reversal of 18780163111 is 11136108781.

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 18780163111 - 2⁵ = 18780163079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18780163411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16273395 + ... + 16274548.

It is an arithmetic number, because the mean of its divisors is an integer number (4703177908).

Almost surely, 2^18780163111 is an apocalyptic number.

18780163111 is a deficient number, since it is larger than the sum of its proper divisors (32548521).

18780163111 is an equidigital number, since it uses as much as digits as its factorization.

18780163111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32548520.

The product of its (nonzero) digits is 8064, while the sum is 37.

The spelling of 18780163111 in words is "eighteen billion, seven hundred eighty million, one hundred sixty-three thousand, one hundred eleven".