23004505 has 4 divisors (see below), whose sum is σ = 27605412. Its totient is φ = 18403600.

The previous prime is 23004493. The next prime is 23004523. The reversal of 23004505 is 50540032.

It is a happy number.

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 6095961 + 16908544 = 2469^2 + 4112^2 .

It is not a de Polignac number, because 23004505 - 2¹¹ = 23002457 is a prime.

It is a Duffinian 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, 2300446 + ... + 2300455.

It is an arithmetic number, because the mean of its divisors is an integer number (6901353).

Almost surely, 2^23004505 is an apocalyptic number.

It is an amenable number.

23004505 is a deficient number, since it is larger than the sum of its proper divisors (4600907).

23004505 is an equidigital number, since it uses as much as digits as its factorization.

23004505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600906.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 23004505 is about 4796.3011790337. The cubic root of 23004505 is about 284.4052643393.

Adding to 23004505 its reverse (50540032), we get a palindrome (73544537).

The spelling of 23004505 in words is "twenty-three million, four thousand, five hundred five".