18321179492 has 48 divisors (see below), whose sum is σ = 40278712320. Its totient is φ = 7083616800.

The previous prime is 18321179479. The next prime is 18321179543. The reversal of 18321179492 is 29497112381.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 186692 + ... + 267387.

It is an arithmetic number, because the mean of its divisors is an integer number (839139840).

Almost surely, 2^18321179492 is an apocalyptic number.

It is an amenable number.

18321179492 is an abundant number, since it is smaller than the sum of its proper divisors (21957532828).

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

18321179492 is a wasteful number, since it uses less digits than its factorization.

18321179492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454232 (or 454230 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The spelling of 18321179492 in words is "eighteen billion, three hundred twenty-one million, one hundred seventy-nine thousand, four hundred ninety-two".