18033473420 has 72 divisors (see below), whose sum is σ = 40124566944. Its totient is φ = 6807036672.

The previous prime is 18033473417. The next prime is 18033473453. The reversal of 18033473420 is 2437433081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1894112 + ... + 1903608.

It is an arithmetic number, because the mean of its divisors is an integer number (557285652).

Almost surely, 2^18033473420 is an apocalyptic number.

18033473420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18033473420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20062283472).

18033473420 is an abundant number, since it is smaller than the sum of its proper divisors (22091093524).

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

18033473420 is a wasteful number, since it uses less digits than its factorization.

18033473420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9807 (or 9786 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 18033473420 in words is "eighteen billion, thirty-three million, four hundred seventy-three thousand, four hundred twenty".