18087816285 has 288 divisors, whose sum is σ = 42066984960. Its totient is φ = 7021175040.

The previous prime is 18087816283. The next prime is 18087816317. The reversal of 18087816285 is 58261878081.

18087816285 is a `hidden beast` number, since 1 + 8 + 0 + 8 + 7 + 8 + 1 + 628 + 5 = 666.

It is not a de Polignac number, because 18087816285 - 2¹ = 18087816283 is a prime.

It is a super-2 number, since 2×18087816285² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087816283) 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 287 ways as a sum of consecutive naturals, for example, 41202096 + ... + 41202534.

It is an arithmetic number, because the mean of its divisors is an integer number (146065920).

Almost surely, 2^18087816285 is an apocalyptic number.

18087816285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18087816285 is an abundant number, since it is smaller than the sum of its proper divisors (23979168675).

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

18087816285 is a wasteful number, since it uses less digits than its factorization.

18087816285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 54.

The spelling of 18087816285 in words is "eighteen billion, eighty-seven million, eight hundred sixteen thousand, two hundred eighty-five".