23205660 has 48 divisors (see below), whose sum is σ = 66738336. Its totient is φ = 6020352.

The previous prime is 23205653. The next prime is 23205671. The reversal of 23205660 is 6650232.

It is a self number, because there is not a number n which added to its sum of digits gives 23205660.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3007 + ... + 7446.

It is an arithmetic number, because the mean of its divisors is an integer number (1390382).

Almost surely, 2^23205660 is an apocalyptic number.

23205660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23205660 is an abundant number, since it is smaller than the sum of its proper divisors (43532676).

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

23205660 is a wasteful number, since it uses less digits than its factorization.

23205660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10502 (or 10500 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 23205660 is about 4817.2253424560. The cubic root of 23205660 is about 285.2318212329.

Adding to 23205660 its reverse (6650232), we get a palindrome (29855892).

The spelling of 23205660 in words is "twenty-three million, two hundred five thousand, six hundred sixty".