18214909664 has 48 divisors (see below), whose sum is σ = 43140585600. Its totient is φ = 7395525504.

The previous prime is 18214909663. The next prime is 18214909747. The reversal of 18214909664 is 46690941281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18214909663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2135654 + ... + 2144165.

It is an arithmetic number, because the mean of its divisors is an integer number (898762200).

Almost surely, 2^18214909664 is an apocalyptic number.

18214909664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18214909664 is an abundant number, since it is smaller than the sum of its proper divisors (24925675936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18214909664 is a wasteful number, since it uses less digits than its factorization.

18214909664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279855 (or 4279847 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 18214909664 in words is "eighteen billion, two hundred fourteen million, nine hundred nine thousand, six hundred sixty-four".