18379444620 has 24 divisors (see below), whose sum is σ = 51462445104. Its totient is φ = 4901185216.

The previous prime is 18379444609. The next prime is 18379444621. The reversal of 18379444620 is 2644497381.

It is a self number, because there is not a number n which added to its sum of digits gives 18379444620.

It is not an unprimeable number, because it can be changed into a prime (18379444621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153161979 + ... + 153162098.

It is an arithmetic number, because the mean of its divisors is an integer number (2144268546).

Almost surely, 2^18379444620 is an apocalyptic number.

18379444620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18379444620 is an abundant number, since it is smaller than the sum of its proper divisors (33083000484).

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

18379444620 is a wasteful number, since it uses less digits than its factorization.

18379444620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306324089 (or 306324087 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 18379444620 in words is "eighteen billion, three hundred seventy-nine million, four hundred forty-four thousand, six hundred twenty".