18274905 has 24 divisors (see below), whose sum is σ = 34557120. Its totient is φ = 8860320.

The previous prime is 18274873. The next prime is 18274909. The reversal of 18274905 is 50947281.

It is not a de Polignac number, because 18274905 - 2⁵ = 18274873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18274905.

It is not an unprimeable number, because it can be changed into a prime (18274909) 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 23 ways as a sum of consecutive naturals, for example, 17965 + ... + 18954.

It is an arithmetic number, because the mean of its divisors is an integer number (1439880).

Almost surely, 2^18274905 is an apocalyptic number.

18274905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18274905 is a deficient number, since it is larger than the sum of its proper divisors (16282215).

18274905 is a wasteful number, since it uses less digits than its factorization.

18274905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36941 (or 36938 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 18274905 is about 4274.9157886443. The cubic root of 18274905 is about 263.4015801677.

The spelling of 18274905 in words is "eighteen million, two hundred seventy-four thousand, nine hundred five".