23520013 has 8 divisors (see below), whose sum is σ = 25823520. Its totient is φ = 21244080.

The previous prime is 23519987. The next prime is 23520017. The reversal of 23520013 is 31002532.

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

It is a de Polignac number, because none of the positive numbers 2^k-23520013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23520017) 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 7 ways as a sum of consecutive naturals, for example, 5083 + ... + 8536.

It is an arithmetic number, because the mean of its divisors is an integer number (3227940).

Almost surely, 2^23520013 is an apocalyptic number.

It is an amenable number.

23520013 is a deficient number, since it is larger than the sum of its proper divisors (2303507).

23520013 is a wasteful number, since it uses less digits than its factorization.

23520013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13787.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 23520013 is about 4849.7436014701. The cubic root of 23520013 is about 286.5140030537.

Adding to 23520013 its reverse (31002532), we get a palindrome (54522545).

The spelling of 23520013 in words is "twenty-three million, five hundred twenty thousand, thirteen".