18103885 has 8 divisors (see below), whose sum is σ = 22081176. Its totient is φ = 14245440.

The previous prime is 18103879. The next prime is 18103909. The reversal of 18103885 is 58830181.

It can be written as a sum of positive squares in 4 ways, for example, as 15876 + 18088009 = 126^2 + 4253^2 .

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

It is not a de Polignac number, because 18103885 - 2⁵ = 18103853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18103885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29374 + ... + 29983.

It is an arithmetic number, because the mean of its divisors is an integer number (2760147).

Almost surely, 2^18103885 is an apocalyptic number.

It is an amenable number.

18103885 is a deficient number, since it is larger than the sum of its proper divisors (3977291).

18103885 is an equidigital number, since it uses as much as digits as its factorization.

18103885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59423.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 18103885 is about 4254.8660378442. The cubic root of 18103885 is about 262.5773498433.

The spelling of 18103885 in words is "eighteen million, one hundred three thousand, eight hundred eighty-five".