23185205 has 4 divisors (see below), whose sum is σ = 27822252. Its totient is φ = 18548160.

The previous prime is 23185193. The next prime is 23185223. The reversal of 23185205 is 50258132.

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 7873636 + 15311569 = 2806^2 + 3913^2 .

It is not a de Polignac number, because 23185205 - 2⁴ = 23185189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2318516 + ... + 2318525.

It is an arithmetic number, because the mean of its divisors is an integer number (6955563).

Almost surely, 2^23185205 is an apocalyptic number.

It is an amenable number.

23185205 is a deficient number, since it is larger than the sum of its proper divisors (4637047).

23185205 is an equidigital number, since it uses as much as digits as its factorization.

23185205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637046.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 23185205 is about 4815.1017642413. The cubic root of 23185205 is about 285.1479892134.

The spelling of 23185205 in words is "twenty-three million, one hundred eighty-five thousand, two hundred five".