23640081 has 8 divisors (see below), whose sum is σ = 33374304. Its totient is φ = 14832960.

The previous prime is 23640059. The next prime is 23640083. The reversal of 23640081 is 18004632.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23640081 - 2⁵ = 23640049 is a prime.

It is a super-2 number, since 2×23640081² = 1117706859373122, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 231715 + ... + 231816.

It is an arithmetic number, because the mean of its divisors is an integer number (4171788).

Almost surely, 2^23640081 is an apocalyptic number.

It is an amenable number.

23640081 is a deficient number, since it is larger than the sum of its proper divisors (9734223).

23640081 is a wasteful number, since it uses less digits than its factorization.

23640081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463551.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 23640081 is about 4862.1066421871. The cubic root of 23640081 is about 287.0007203339. Note that the first 3 decimals are identical.

The spelling of 23640081 in words is "twenty-three million, six hundred forty thousand, eighty-one".