23720235 has 48 divisors (see below), whose sum is σ = 47701248. Its totient is φ = 9852480.

The previous prime is 23720209. The next prime is 23720237. The reversal of 23720235 is 53202732.

It is not a de Polignac number, because 23720235 - 2⁸ = 23719979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23720237) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11772 + ... + 13638.

It is an arithmetic number, because the mean of its divisors is an integer number (993776).

Almost surely, 2^23720235 is an apocalyptic number.

23720235 is an abundant number, since it is smaller than the sum of its proper divisors (23981013).

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

23720235 is a wasteful number, since it uses less digits than its factorization.

23720235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 23720235 is about 4870.3423904280. The cubic root of 23720235 is about 287.3247223993.

Adding to 23720235 its reverse (53202732), we get a palindrome (76922967).

The spelling of 23720235 in words is "twenty-three million, seven hundred twenty thousand, two hundred thirty-five".