23180845 has 4 divisors (see below), whose sum is σ = 27817020. Its totient is φ = 18544672.

The previous prime is 23180837. The next prime is 23180869. The reversal of 23180845 is 54808132.

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 7767369 + 15413476 = 2787^2 + 3926^2 .

It is a cyclic number.

It is not a de Polignac number, because 23180845 - 2³ = 23180837 is a prime.

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, 2318080 + ... + 2318089.

It is an arithmetic number, because the mean of its divisors is an integer number (6954255).

Almost surely, 2^23180845 is an apocalyptic number.

It is an amenable number.

23180845 is a deficient number, since it is larger than the sum of its proper divisors (4636175).

23180845 is an equidigital number, since it uses as much as digits as its factorization.

23180845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636174.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 23180845 is about 4814.6490007061. The cubic root of 23180845 is about 285.1301139754.

Adding to 23180845 its reverse (54808132), we get a palindrome (77988977).

It can be divided in two parts, 23180 and 845, that added together give a square (24025 = 155²).

The spelling of 23180845 in words is "twenty-three million, one hundred eighty thousand, eight hundred forty-five".