23640003 has 12 divisors (see below), whose sum is σ = 35070048. Its totient is φ = 15333840.

The previous prime is 23639999. The next prime is 23640037. The reversal of 23640003 is 30004632.

23640003 is a `hidden beast` number, since 23 + 640 + 0 + 0 + 3 = 666.

It is not a de Polignac number, because 23640003 - 2² = 23639999 is a prime.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (23640083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35163 + ... + 35828.

It is an arithmetic number, because the mean of its divisors is an integer number (2922504).

Almost surely, 2^23640003 is an apocalyptic number.

23640003 is a deficient number, since it is larger than the sum of its proper divisors (11430045).

23640003 is a wasteful number, since it uses less digits than its factorization.

23640003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71034 (or 71031 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 23640003 is about 4862.0986209661. The cubic root of 23640003 is about 287.0004046824. Note that the first 3 decimals are identical.

Adding to 23640003 its reverse (30004632), we get a palindrome (53644635).

The spelling of 23640003 in words is "twenty-three million, six hundred forty thousand, three".