23660545 has 4 divisors (see below), whose sum is σ = 28392660. Its totient is φ = 18928432.

The previous prime is 23660519. The next prime is 23660557. The reversal of 23660545 is 54506632.

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 15555136 + 8105409 = 3944^2 + 2847^2 .

It is a cyclic number.

It is not a de Polignac number, because 23660545 - 2⁵ = 23660513 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2366050 + ... + 2366059.

It is an arithmetic number, because the mean of its divisors is an integer number (7098165).

Almost surely, 2^23660545 is an apocalyptic number.

It is an amenable number.

23660545 is a deficient number, since it is larger than the sum of its proper divisors (4732115).

23660545 is an equidigital number, since it uses as much as digits as its factorization.

23660545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732114.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 23660545 is about 4864.2106245515. The cubic root of 23660545 is about 287.0835103612.

The spelling of 23660545 in words is "twenty-three million, six hundred sixty thousand, five hundred forty-five".