18520168367020 has 48 divisors (see below), whose sum is σ = 39064627294560. Its totient is φ = 7375312710144.

The previous prime is 18520168367009. The next prime is 18520168367039. The reversal of 18520168367020 is 2076386102581.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3133696 + ... + 6845464.

It is an arithmetic number, because the mean of its divisors is an integer number (813846401970).

Almost surely, 2^{18520168367020} is an apocalyptic number.

18520168367020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18520168367020 is an abundant number, since it is smaller than the sum of its proper divisors (20544458927540).

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

18520168367020 is a wasteful number, since it uses less digits than its factorization.

18520168367020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712882 (or 3712880 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 18520168367020 in words is "eighteen trillion, five hundred twenty billion, one hundred sixty-eight million, three hundred sixty-seven thousand, twenty".