18478887164 has 24 divisors (see below), whose sum is σ = 33105058560. Its totient is φ = 9021239216.

The previous prime is 18478887121. The next prime is 18478887169. The reversal of 18478887164 is 46178887481.

It is a junction number, because it is equal to n+sod(n) for n = 18478887097 and 18478887106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18478887169) 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 7 ways as a sum of consecutive naturals, for example, 38522 + ... + 196065.

It is an arithmetic number, because the mean of its divisors is an integer number (1379377440).

Almost surely, 2^18478887164 is an apocalyptic number.

It is an amenable number.

18478887164 is a deficient number, since it is larger than the sum of its proper divisors (14626171396).

18478887164 is a wasteful number, since it uses less digits than its factorization.

18478887164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235057 (or 235055 counting only the distinct ones).

The product of its digits is 19267584, while the sum is 62.

The spelling of 18478887164 in words is "eighteen billion, four hundred seventy-eight million, eight hundred eighty-seven thousand, one hundred sixty-four".