18087795 has 24 divisors (see below), whose sum is σ = 34203312. Its totient is φ = 8769600.

The previous prime is 18087757. The next prime is 18087827. The reversal of 18087795 is 59778081.

It is not a de Polignac number, because 18087795 - 2⁶ = 18087731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18087795.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 17776 + ... + 18765.

It is an arithmetic number, because the mean of its divisors is an integer number (1425138).

Almost surely, 2^18087795 is an apocalyptic number.

18087795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18087795 is a deficient number, since it is larger than the sum of its proper divisors (16115517).

18087795 is a wasteful number, since it uses less digits than its factorization.

18087795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36563 (or 36560 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 18087795 is about 4252.9748412141. The cubic root of 18087795 is about 262.4995374142.

The spelling of 18087795 in words is "eighteen million, eighty-seven thousand, seven hundred ninety-five".