23120013 has 12 divisors (see below), whose sum is σ = 35859840. Its totient is φ = 13211352.

The previous prime is 23119973. The next prime is 23120029. The reversal of 23120013 is 31002132.

It is a happy number.

It is not a de Polignac number, because 23120013 - 2¹³ = 23111821 is a prime.

It is a super-2 number, since 2×23120013² = 1069070002240338, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23120033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78493 + ... + 78786.

It is an arithmetic number, because the mean of its divisors is an integer number (2988320).

Almost surely, 2^23120013 is an apocalyptic number.

It is an amenable number.

23120013 is a deficient number, since it is larger than the sum of its proper divisors (12739827).

23120013 is a wasteful number, since it uses less digits than its factorization.

23120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157296 (or 157289 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 23120013 is about 4808.3274638901. The cubic root of 23120013 is about 284.8804792771.

Adding to 23120013 its reverse (31002132), we get a palindrome (54122145).

The spelling of 23120013 in words is "twenty-three million, one hundred twenty thousand, thirteen".