18252985 has 8 divisors (see below), whose sum is σ = 23192136. Its totient is φ = 13743360.

The previous prime is 18252979. The next prime is 18252991. The reversal of 18252985 is 58925281.

It is an interprime number because it is at equal distance from previous prime (18252979) and next prime (18252991).

It can be written as a sum of positive squares in 4 ways, for example, as 839056 + 17413929 = 916^2 + 4173^2 .

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

It is not a de Polignac number, because 18252985 - 2⁵ = 18252953 is a prime.

It is a super-2 number, since 2×18252985² = 666342922820450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107286 + ... + 107455.

It is an arithmetic number, because the mean of its divisors is an integer number (2899017).

Almost surely, 2^18252985 is an apocalyptic number.

It is an amenable number.

18252985 is a deficient number, since it is larger than the sum of its proper divisors (4939151).

18252985 is a wasteful number, since it uses less digits than its factorization.

18252985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214763.

The product of its digits is 57600, while the sum is 40.

The square root of 18252985 is about 4272.3512261985. The cubic root of 18252985 is about 263.2962248979.

The spelling of 18252985 in words is "eighteen million, two hundred fifty-two thousand, nine hundred eighty-five".