18389870028468 has 18 divisors (see below), whose sum is σ = 46485504794274. Its totient is φ = 6129956676144.

The previous prime is 18389870028461. The next prime is 18389870028529. The reversal of 18389870028468 is 86482007898381.

18389870028468 is a `hidden beast` number, since 1 + 8 + 3 + 8 + 98 + 70 + 0 + 2 + 8 + 468 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15065126229924 + 3324743798544 = 3881382^2 + 1823388^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 18389870028396 and 18389870028405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18389870028461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 255414861471 + ... + 255414861542.

Almost surely, 2^{18389870028468} is an apocalyptic number.

18389870028468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18389870028468 is an abundant number, since it is smaller than the sum of its proper divisors (28095634765806).

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

18389870028468 is a wasteful number, since it uses less digits than its factorization.

18389870028468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510829723023 (or 510829723018 counting only the distinct ones).

The product of its (nonzero) digits is 297271296, while the sum is 72.

The spelling of 18389870028468 in words is "eighteen trillion, three hundred eighty-nine billion, eight hundred seventy million, twenty-eight thousand, four hundred sixty-eight".