18540885 has 32 divisors (see below), whose sum is σ = 33247872. Its totient is φ = 8743680.

The previous prime is 18540881. The next prime is 18540901. The reversal of 18540885 is 58804581.

It is not a de Polignac number, because 18540885 - 2² = 18540881 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18540881) 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 31 ways as a sum of consecutive naturals, for example, 4587 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (1038996).

Almost surely, 2^18540885 is an apocalyptic number.

18540885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18540885 is a deficient number, since it is larger than the sum of its proper divisors (14706987).

18540885 is a wasteful number, since it uses less digits than its factorization.

18540885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3093.

The product of its (nonzero) digits is 51200, while the sum is 39.

The square root of 18540885 is about 4305.9127952154. The cubic root of 18540885 is about 264.6733128701.

The spelling of 18540885 in words is "eighteen million, five hundred forty thousand, eight hundred eighty-five".