18379821601836 has 36 divisors (see below), whose sum is σ = 46463581552752. Its totient is φ = 6126148701984.

The previous prime is 18379821601769. The next prime is 18379821601849. The reversal of 18379821601836 is 63810612897381.

18379821601836 is a `hidden beast` number, since 1 + 8 + 379 + 8 + 21 + 60 + 183 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18616215 + ... + 19578638.

It is an arithmetic number, because the mean of its divisors is an integer number (1290655043132).

Almost surely, 2^{18379821601836} is an apocalyptic number.

It is an amenable number.

18379821601836 is an abundant number, since it is smaller than the sum of its proper divisors (28083759950916).

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

18379821601836 is a wasteful number, since it uses less digits than its factorization.

18379821601836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38208230 (or 38208225 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 18379821601836 in words is "eighteen trillion, three hundred seventy-nine billion, eight hundred twenty-one million, six hundred one thousand, eight hundred thirty-six".