18380028272 has 20 divisors (see below), whose sum is σ = 37159623120. Its totient is φ = 8790448128.

The previous prime is 18380028263. The next prime is 18380028283. The reversal of 18380028272 is 27282008381.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24972497 + ... + 24973232.

It is an arithmetic number, because the mean of its divisors is an integer number (1857981156).

Almost surely, 2^18380028272 is an apocalyptic number.

It is an amenable number.

18380028272 is an abundant number, since it is smaller than the sum of its proper divisors (18779594848).

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

18380028272 is a wasteful number, since it uses less digits than its factorization.

18380028272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49945760 (or 49945754 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The spelling of 18380028272 in words is "eighteen billion, three hundred eighty million, twenty-eight thousand, two hundred seventy-two".