23613016021 has 4 divisors (see below), whose sum is σ = 26986304032. Its totient is φ = 20239728012.

The previous prime is 23613016013. The next prime is 23613016067. The reversal of 23613016021 is 12061031632.

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 23613016021 - 2³ = 23613016013 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 (23613016081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686643995 + ... + 1686644008.

It is an arithmetic number, because the mean of its divisors is an integer number (6746576008).

Almost surely, 2^23613016021 is an apocalyptic number.

It is an amenable number.

23613016021 is a deficient number, since it is larger than the sum of its proper divisors (3373288011).

23613016021 is an equidigital number, since it uses as much as digits as its factorization.

23613016021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373288010.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 23613016021 its reverse (12061031632), we get a palindrome (35674047653).

The spelling of 23613016021 in words is "twenty-three billion, six hundred thirteen million, sixteen thousand, twenty-one".