18164187859312 has 20 divisors (see below), whose sum is σ = 38392487975736. Its totient is φ = 8256449026880.

The previous prime is 18164187859303. The next prime is 18164187859333. The reversal of 18164187859312 is 21395878146181.

It is a super-2 number, since 2×18164187859312² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51602806243 + ... + 51602806594.

Almost surely, 2^{18164187859312} is an apocalyptic number.

It is an amenable number.

18164187859312 is an abundant number, since it is smaller than the sum of its proper divisors (20228300116424).

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

18164187859312 is a wasteful number, since it uses less digits than its factorization.

18164187859312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103205612856 (or 103205612850 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 64.

The spelling of 18164187859312 in words is "eighteen trillion, one hundred sixty-four billion, one hundred eighty-seven million, eight hundred fifty-nine thousand, three hundred twelve".