18481865020 has 12 divisors (see below), whose sum is σ = 38811916584. Its totient is φ = 7392746000.

The previous prime is 18481865011. The next prime is 18481865021. The reversal of 18481865020 is 2056818481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18481865021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 462046606 + ... + 462046645.

It is an arithmetic number, because the mean of its divisors is an integer number (3234326382).

Almost surely, 2^18481865020 is an apocalyptic number.

18481865020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18481865020 is an abundant number, since it is smaller than the sum of its proper divisors (20330051564).

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

18481865020 is a wasteful number, since it uses less digits than its factorization.

18481865020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924093260 (or 924093258 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 18481865020 in words is "eighteen billion, four hundred eighty-one million, eight hundred sixty-five thousand, twenty".