18274285 has 4 divisors (see below), whose sum is σ = 21929148. Its totient is φ = 14619424.

The previous prime is 18274279. The next prime is 18274301. The reversal of 18274285 is 58247281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58247281 = 619 ⋅94099.

It can be written as a sum of positive squares in 2 ways, for example, as 3305124 + 14969161 = 1818^2 + 3869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18274285 is a prime.

It is a super-2 number, since 2×18274285² = 667898984522450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1827424 + ... + 1827433.

It is an arithmetic number, because the mean of its divisors is an integer number (5482287).

Almost surely, 2^18274285 is an apocalyptic number.

It is an amenable number.

18274285 is a deficient number, since it is larger than the sum of its proper divisors (3654863).

18274285 is an equidigital number, since it uses as much as digits as its factorization.

18274285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654862.

The product of its digits is 35840, while the sum is 37.

The square root of 18274285 is about 4274.8432719809. The cubic root of 18274285 is about 263.3986013866.

The spelling of 18274285 in words is "eighteen million, two hundred seventy-four thousand, two hundred eighty-five".