23045405 has 4 divisors (see below), whose sum is σ = 27654492. Its totient is φ = 18436320.

The previous prime is 23045381. The next prime is 23045437. The reversal of 23045405 is 50454032.

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 11464996 + 11580409 = 3386^2 + 3403^2 .

It is not a de Polignac number, because 23045405 - 2¹² = 23041309 is a prime.

It is a super-2 number, since 2×23045405² = 1062181383228050, which contains 22 as substring.

It is a Duffinian number.

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, 2304536 + ... + 2304545.

It is an arithmetic number, because the mean of its divisors is an integer number (6913623).

Almost surely, 2^23045405 is an apocalyptic number.

It is an amenable number.

23045405 is a deficient number, since it is larger than the sum of its proper divisors (4609087).

23045405 is an equidigital number, since it uses as much as digits as its factorization.

23045405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609086.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 23045405 is about 4800.5629878172. The cubic root of 23045405 is about 284.5737137865.

Adding to 23045405 its reverse (50454032), we get a palindrome (73499437).

The spelling of 23045405 in words is "twenty-three million, forty-five thousand, four hundred five".