23663140 has 12 divisors (see below), whose sum is σ = 49692636. Its totient is φ = 9465248.

The previous prime is 23663119. The next prime is 23663141. The reversal of 23663140 is 4136632.

It can be written as a sum of positive squares in 2 ways, for example, as 5207524 + 18455616 = 2282^2 + 4296^2 .

It is not an unprimeable number, because it can be changed into a prime (23663141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591559 + ... + 591598.

It is an arithmetic number, because the mean of its divisors is an integer number (4141053).

Almost surely, 2^23663140 is an apocalyptic number.

23663140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23663140 is an abundant number, since it is smaller than the sum of its proper divisors (26029496).

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

23663140 is a wasteful number, since it uses less digits than its factorization.

23663140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183166 (or 1183164 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 23663140 is about 4864.4773614439. The cubic root of 23663140 is about 287.0940053924.

Adding to 23663140 its reverse (4136632), we get a palindrome (27799772).

The spelling of 23663140 in words is "twenty-three million, six hundred sixty-three thousand, one hundred forty".