18484800321 has 16 divisors (see below), whose sum is σ = 26552212736. Its totient is φ = 11371003776.

The previous prime is 18484800319. The next prime is 18484800337. The reversal of 18484800321 is 12300848481.

It is a happy number.

It is not a de Polignac number, because 18484800321 - 2¹ = 18484800319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18484800321.

It is not an unprimeable number, because it can be changed into a prime (18484800391) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18456 + ... + 193158.

It is an arithmetic number, because the mean of its divisors is an integer number (1659513296).

Almost surely, 2^18484800321 is an apocalyptic number.

It is an amenable number.

18484800321 is a deficient number, since it is larger than the sum of its proper divisors (8067412415).

18484800321 is a wasteful number, since it uses less digits than its factorization.

18484800321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177432.

The product of its (nonzero) digits is 49152, while the sum is 39.

The spelling of 18484800321 in words is "eighteen billion, four hundred eighty-four million, eight hundred thousand, three hundred twenty-one".