18582145 has 4 divisors (see below), whose sum is σ = 22298580. Its totient is φ = 14865712.

The previous prime is 18582131. The next prime is 18582167. The reversal of 18582145 is 54128581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8520561 + 10061584 = 2919^2 + 3172^2 .

It is a cyclic number.

It is not a de Polignac number, because 18582145 - 2¹³ = 18573953 is a prime.

It is a super-2 number, since 2×18582145² = 690592225602050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18582145.

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, 1858210 + ... + 1858219.

It is an arithmetic number, because the mean of its divisors is an integer number (5574645).

Almost surely, 2^18582145 is an apocalyptic number.

It is an amenable number.

18582145 is a deficient number, since it is larger than the sum of its proper divisors (3716435).

18582145 is an equidigital number, since it uses as much as digits as its factorization.

18582145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716434.

The product of its digits is 12800, while the sum is 34.

The square root of 18582145 is about 4310.7012190594. The cubic root of 18582145 is about 264.8694978651.

The spelling of 18582145 in words is "eighteen million, five hundred eighty-two thousand, one hundred forty-five".