18028012308 has 24 divisors (see below), whose sum is σ = 42083170080. Its totient is φ = 6006793440.

The previous prime is 18028012243. The next prime is 18028012333. The reversal of 18028012308 is 80321082081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288363 + ... + 345266.

It is an arithmetic number, because the mean of its divisors is an integer number (1753465420).

Almost surely, 2^18028012308 is an apocalyptic number.

It is an amenable number.

18028012308 is an abundant number, since it is smaller than the sum of its proper divisors (24055157772).

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

18028012308 is a wasteful number, since it uses less digits than its factorization.

18028012308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636007 (or 636005 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

Adding to 18028012308 its reverse (80321082081), we get a palindrome (98349094389).

The spelling of 18028012308 in words is "eighteen billion, twenty-eight million, twelve thousand, three hundred eight".