23640204 has 24 divisors (see below), whose sum is σ = 63040768. Its totient is φ = 6754320.

The previous prime is 23640203. The next prime is 23640209. The reversal of 23640204 is 40204632.

23640204 = T₃₀₁ + T₃₀₂ + ... + T₅₅₂.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (23640203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 140632 + ... + 140799.

Almost surely, 2^23640204 is an apocalyptic number.

It is an amenable number.

23640204 is an abundant number, since it is smaller than the sum of its proper divisors (39400564).

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

23640204 is a wasteful number, since it uses less digits than its factorization.

23640204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281445 (or 281443 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 23640204 is about 4862.1192910088. The cubic root of 23640204 is about 287.0012180906.

Adding to 23640204 its reverse (40204632), we get a palindrome (63844836).

The spelling of 23640204 in words is "twenty-three million, six hundred forty thousand, two hundred four".