23013310521 has 4 divisors (see below), whose sum is σ = 30684414032. Its totient is φ = 15342207012.

The previous prime is 23013310457. The next prime is 23013310531. The reversal of 23013310521 is 12501331032.

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 23013310521 - 2⁶ = 23013310457 is a prime.

It is a super-2 number, since 2×23013310521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23013310531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3835551751 + ... + 3835551756.

It is an arithmetic number, because the mean of its divisors is an integer number (7671103508).

Almost surely, 2^23013310521 is an apocalyptic number.

It is an amenable number.

23013310521 is a deficient number, since it is larger than the sum of its proper divisors (7671103511).

23013310521 is an equidigital number, since it uses as much as digits as its factorization.

23013310521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7671103510.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 23013310521 its reverse (12501331032), we get a palindrome (35514641553).

The spelling of 23013310521 in words is "twenty-three billion, thirteen million, three hundred ten thousand, five hundred twenty-one".