18632144328 has 64 divisors (see below), whose sum is σ = 53984517120. Its totient is φ = 5248488000.

The previous prime is 18632144327. The next prime is 18632144351. The reversal of 18632144328 is 82344123681.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18632144328.

It is not an unprimeable number, because it can be changed into a prime (18632144327) 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 15 ways as a sum of consecutive naturals, for example, 769098 + ... + 792953.

It is an arithmetic number, because the mean of its divisors is an integer number (843508080).

Almost surely, 2^18632144328 is an apocalyptic number.

It is an amenable number.

18632144328 is an abundant number, since it is smaller than the sum of its proper divisors (35352372792).

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

18632144328 is a wasteful number, since it uses less digits than its factorization.

18632144328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562138 (or 1562134 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The spelling of 18632144328 in words is "eighteen billion, six hundred thirty-two million, one hundred forty-four thousand, three hundred twenty-eight".