18669209328 has 360 divisors, whose sum is σ = 70208564400. Its totient is φ = 4563578880.

The previous prime is 18669209327. The next prime is 18669209347. The reversal of 18669209328 is 82390296681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18669209327) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1312398 + ... + 1326546.

It is an arithmetic number, because the mean of its divisors is an integer number (195023790).

Almost surely, 2^18669209328 is an apocalyptic number.

18669209328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18669209328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35104282200).

18669209328 is an abundant number, since it is smaller than the sum of its proper divisors (51539355072).

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

18669209328 is a wasteful number, since it uses less digits than its factorization.

18669209328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14205 (or 14189 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 18669209328 in words is "eighteen billion, six hundred sixty-nine million, two hundred nine thousand, three hundred twenty-eight".