18464321968 has 20 divisors (see below), whose sum is σ = 35872113760. Its totient is φ = 9207002304.

The previous prime is 18464321963. The next prime is 18464321971. The reversal of 18464321968 is 86912346481.

It is not an unprimeable number, because it can be changed into a prime (18464321963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566363 + ... + 1578106.

It is an arithmetic number, because the mean of its divisors is an integer number (1793605688).

Almost surely, 2^18464321968 is an apocalyptic number.

It is an amenable number.

18464321968 is a deficient number, since it is larger than the sum of its proper divisors (17407791792).

18464321968 is a wasteful number, since it uses less digits than its factorization.

18464321968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144844 (or 3144838 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 52.

The spelling of 18464321968 in words is "eighteen billion, four hundred sixty-four million, three hundred twenty-one thousand, nine hundred sixty-eight".