10218805 has 4 divisors (see below), whose sum is σ = 12262572. Its totient is φ = 8175040.

The previous prime is 10218763. The next prime is 10218829. The reversal of 10218805 is 50881201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50881201 = 7 ⋅7268743.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 8162449 = 1434^2 + 2857^2 .

It is not a de Polignac number, because 10218805 - 2¹⁵ = 10186037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10218805.

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, 1021876 + ... + 1021885.

It is an arithmetic number, because the mean of its divisors is an integer number (3065643).

Almost surely, 2^10218805 is an apocalyptic number.

It is an amenable number.

10218805 is a deficient number, since it is larger than the sum of its proper divisors (2043767).

10218805 is an equidigital number, since it uses as much as digits as its factorization.

10218805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043766.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 10218805 is about 3196.6865658053. The cubic root of 10218805 is about 217.0034827108.

The spelling of 10218805 in words is "ten million, two hundred eighteen thousand, eight hundred five".