18489769864 has 16 divisors (see below), whose sum is σ = 35474559120. Its totient is φ = 9029887440.

The previous prime is 18489769829. The next prime is 18489769927. The reversal of 18489769864 is 46896798481.

It is a junction number, because it is equal to n+sod(n) for n = 18489769793 and 18489769802.

It is an unprimeable number.

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, 26874322 + ... + 26875009.

It is an arithmetic number, because the mean of its divisors is an integer number (2217159945).

Almost surely, 2^18489769864 is an apocalyptic number.

It is an amenable number.

18489769864 is a deficient number, since it is larger than the sum of its proper divisors (16984789256).

18489769864 is a wasteful number, since it uses less digits than its factorization.

18489769864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53749380 (or 53749376 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 70.

The spelling of 18489769864 in words is "eighteen billion, four hundred eighty-nine million, seven hundred sixty-nine thousand, eight hundred sixty-four".