18073887 has 8 divisors (see below), whose sum is σ = 25952304. Its totient is φ = 11122368.

The previous prime is 18073877. The next prime is 18073919. The reversal of 18073887 is 78837081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18073887 - 2⁶ = 18073823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18073877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231678 + ... + 231755.

It is an arithmetic number, because the mean of its divisors is an integer number (3244038).

Almost surely, 2^18073887 is an apocalyptic number.

18073887 is a deficient number, since it is larger than the sum of its proper divisors (7878417).

18073887 is a wasteful number, since it uses less digits than its factorization.

18073887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463449.

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 18073887 is about 4251.3394359896. The cubic root of 18073887 is about 262.4322401068.

The spelling of 18073887 in words is "eighteen million, seventy-three thousand, eight hundred eighty-seven".