18881084864 has 14 divisors (see below), whose sum is σ = 37467152904. Its totient is φ = 9440542400.

The previous prime is 18881084863. The next prime is 18881084881. The reversal of 18881084864 is 46848018881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18881084861) 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 as a sum of consecutive naturals, namely, 147508412 + ... + 147508539.

Almost surely, 2^18881084864 is an apocalyptic number.

It is an amenable number.

18881084864 is a deficient number, since it is larger than the sum of its proper divisors (18586068040).

18881084864 is an equidigital number, since it uses as much as digits as its factorization.

18881084864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295016963 (or 295016953 counting only the distinct ones).

The product of its (nonzero) digits is 3145728, while the sum is 56.

The spelling of 18881084864 in words is "eighteen billion, eight hundred eighty-one million, eighty-four thousand, eight hundred sixty-four".