18215945382 has 32 divisors (see below), whose sum is σ = 37415001600. Its totient is φ = 5909574368.

The previous prime is 18215945351. The next prime is 18215945401. The reversal of 18215945382 is 28354951281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129957 + ... + 230912.

It is an arithmetic number, because the mean of its divisors is an integer number (1169218800).

Almost surely, 2^18215945382 is an apocalyptic number.

18215945382 is an abundant number, since it is smaller than the sum of its proper divisors (19199056218).

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

18215945382 is a wasteful number, since it uses less digits than its factorization.

18215945382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361100.

The product of its digits is 691200, while the sum is 48.

The spelling of 18215945382 in words is "eighteen billion, two hundred fifteen million, nine hundred forty-five thousand, three hundred eighty-two".