20232424133521 has 4 divisors (see below), whose sum is σ = 20476188279792. Its totient is φ = 19988659987252.

The previous prime is 20232424133507. The next prime is 20232424133591. The reversal of 20232424133521 is 12533142423202.

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 a cyclic number.

It is not a de Polignac number, because 20232424133521 - 2¹⁷ = 20232424002449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20232424133591) 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, 121882073011 + ... + 121882073176.

It is an arithmetic number, because the mean of its divisors is an integer number (5119047069948).

Almost surely, 2^{20232424133521} is an apocalyptic number.

It is an amenable number.

20232424133521 is a deficient number, since it is larger than the sum of its proper divisors (243764146271).

20232424133521 is an equidigital number, since it uses as much as digits as its factorization.

20232424133521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243764146270.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 20232424133521 its reverse (12533142423202), we get a palindrome (32765566556723).

The spelling of 20232424133521 in words is "twenty trillion, two hundred thirty-two billion, four hundred twenty-four million, one hundred thirty-three thousand, five hundred twenty-one".