23640851 has 4 divisors (see below), whose sum is σ = 25459392. Its totient is φ = 21822312.

The previous prime is 23640847. The next prime is 23640871. The reversal of 23640851 is 15804632.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23640851 - 2² = 23640847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23640821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909251 + ... + 909276.

It is an arithmetic number, because the mean of its divisors is an integer number (6364848).

Almost surely, 2^23640851 is an apocalyptic number.

23640851 is a deficient number, since it is larger than the sum of its proper divisors (1818541).

23640851 is a wasteful number, since it uses less digits than its factorization.

23640851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818540.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 23640851 is about 4862.1858253259. The cubic root of 23640851 is about 287.0038363435.

The spelling of 23640851 in words is "twenty-three million, six hundred forty thousand, eight hundred fifty-one".