18365824020 has 48 divisors (see below), whose sum is σ = 51668059968. Its totient is φ = 4874338560.

The previous prime is 18365824019. The next prime is 18365824031. The reversal of 18365824020 is 2042856381.

It is a self number, because there is not a number n which added to its sum of digits gives 18365824020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712689 + ... + 738008.

It is an arithmetic number, because the mean of its divisors is an integer number (1076417916).

Almost surely, 2^18365824020 is an apocalyptic number.

18365824020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18365824020 is an abundant number, since it is smaller than the sum of its proper divisors (33302235948).

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

18365824020 is a wasteful number, since it uses less digits than its factorization.

18365824020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450920 (or 1450918 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 18365824020 in words is "eighteen billion, three hundred sixty-five million, eight hundred twenty-four thousand, twenty".