23645320 has 32 divisors (see below), whose sum is σ = 53371800. Its totient is φ = 9427968.

The previous prime is 23645309. The next prime is 23645327. The reversal of 23645320 is 2354632.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17623204 + 6022116 = 4198^2 + 2454^2 .

It is not an unprimeable number, because it can be changed into a prime (23645327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15136 + ... + 16624.

Almost surely, 2^23645320 is an apocalyptic number.

23645320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23645320 is an abundant number, since it is smaller than the sum of its proper divisors (29726480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23645320 is a wasteful number, since it uses less digits than its factorization.

23645320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 23645320 is about 4862.6453705776. The cubic root of 23645320 is about 287.0219200034.

Adding to 23645320 its reverse (2354632), we get a palindrome (25999952).

The spelling of 23645320 in words is "twenty-three million, six hundred forty-five thousand, three hundred twenty".