18140886 has 12 divisors (see below), whose sum is σ = 39305292. Its totient is φ = 6046956.

The previous prime is 18140869. The next prime is 18140891. The reversal of 18140886 is 68804181.

It is a self number, because there is not a number n which added to its sum of digits gives 18140886.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 503896 + ... + 503931.

It is an arithmetic number, because the mean of its divisors is an integer number (3275441).

Almost surely, 2^18140886 is an apocalyptic number.

18140886 is an abundant number, since it is smaller than the sum of its proper divisors (21164406).

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

18140886 is a wasteful number, since it uses less digits than its factorization.

18140886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007835 (or 1007832 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 18140886 is about 4259.2118989315. The cubic root of 18140886 is about 262.7561146599.

The spelling of 18140886 in words is "eighteen million, one hundred forty thousand, eight hundred eighty-six".