18866724063 has 32 divisors (see below), whose sum is σ = 28953980160. Its totient is φ = 10807395840.

The previous prime is 18866724061. The next prime is 18866724077. The reversal of 18866724063 is 36042766881.

It is not a de Polignac number, because 18866724063 - 2¹ = 18866724061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18866723997 and 18866724015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18866724061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236745 + ... + 306237.

It is an arithmetic number, because the mean of its divisors is an integer number (904811880).

Almost surely, 2^18866724063 is an apocalyptic number.

18866724063 is a deficient number, since it is larger than the sum of its proper divisors (10087256097).

18866724063 is a wasteful number, since it uses less digits than its factorization.

18866724063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69959.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 18866724063 in words is "eighteen billion, eight hundred sixty-six million, seven hundred twenty-four thousand, sixty-three".