18840105 has 48 divisors (see below), whose sum is σ = 34594560. Its totient is φ = 9465984.

The previous prime is 18840083. The next prime is 18840113. The reversal of 18840105 is 50104881.

It is not a de Polignac number, because 18840105 - 2¹⁰ = 18839081 is a prime.

It is a super-2 number, since 2×18840105² = 709899112822050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112732 + ... + 112898.

It is an arithmetic number, because the mean of its divisors is an integer number (720720).

Almost surely, 2^18840105 is an apocalyptic number.

18840105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18840105 is a deficient number, since it is larger than the sum of its proper divisors (15754455).

18840105 is a wasteful number, since it uses less digits than its factorization.

18840105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 18840105 is about 4340.5189781868. The cubic root of 18840105 is about 266.0895217555.

Adding to 18840105 its reverse (50104881), we get a palindrome (68944986).

The spelling of 18840105 in words is "eighteen million, eight hundred forty thousand, one hundred five".