23665013 has 4 divisors (see below), whose sum is σ = 24910560. Its totient is φ = 22419468.

The previous prime is 23664973. The next prime is 23665021. The reversal of 23665013 is 31056632.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23665013 - 2²² = 19470709 is a prime.

It is a super-3 number, since 3×23665013³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23625013) 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, 622745 + ... + 622782.

It is an arithmetic number, because the mean of its divisors is an integer number (6227640).

Almost surely, 2^23665013 is an apocalyptic number.

It is an amenable number.

23665013 is a deficient number, since it is larger than the sum of its proper divisors (1245547).

23665013 is a wasteful number, since it uses less digits than its factorization.

23665013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245546.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 23665013 is about 4864.6698757470. The cubic root of 23665013 is about 287.1015799420.

The spelling of 23665013 in words is "twenty-three million, six hundred sixty-five thousand, thirteen".