18020866824 has 64 divisors (see below), whose sum is σ = 50553648000. Its totient is φ = 5947473600.

The previous prime is 18020866823. The next prime is 18020866849. The reversal of 18020866824 is 42866802081.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18020866824.

It is not an unprimeable number, because it can be changed into a prime (18020866823) by changing a digit.

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, 391204 + ... + 434835.

It is an arithmetic number, because the mean of its divisors is an integer number (789900750).

Almost surely, 2^18020866824 is an apocalyptic number.

It is an amenable number.

18020866824 is an abundant number, since it is smaller than the sum of its proper divisors (32532781176).

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

18020866824 is a wasteful number, since it uses less digits than its factorization.

18020866824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826155 (or 826145 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 18020866824 in words is "eighteen billion, twenty million, eight hundred sixty-six thousand, eight hundred twenty-four".