18248705 has 4 divisors (see below), whose sum is σ = 21898452. Its totient is φ = 14598960.

The previous prime is 18248687. The next prime is 18248719. The reversal of 18248705 is 50784281.

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 8620096 + 9628609 = 2936^2 + 3103^2 .

It is not a de Polignac number, because 18248705 - 2⁸ = 18248449 is a prime.

It is a Duffinian 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, 1824866 + ... + 1824875.

It is an arithmetic number, because the mean of its divisors is an integer number (5474613).

Almost surely, 2^18248705 is an apocalyptic number.

It is an amenable number.

18248705 is a deficient number, since it is larger than the sum of its proper divisors (3649747).

18248705 is an equidigital number, since it uses as much as digits as its factorization.

18248705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649746.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 18248705 is about 4271.8503016843. The cubic root of 18248705 is about 263.2756438636.

The spelling of 18248705 in words is "eighteen million, two hundred forty-eight thousand, seven hundred five".