23040440421443 has 4 divisors (see below), whose sum is σ = 23834938367040. Its totient is φ = 22245942475848.

The previous prime is 23040440421419. The next prime is 23040440421461. The reversal of 23040440421443 is 34412404404032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23040440421443 is a prime.

It is a super-3 number, since 3×23040440421443³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23040440421143) 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, 397248972755 + ... + 397248972812.

It is an arithmetic number, because the mean of its divisors is an integer number (5958734591760).

Almost surely, 2^{23040440421443} is an apocalyptic number.

23040440421443 is a deficient number, since it is larger than the sum of its proper divisors (794497945597).

23040440421443 is an equidigital number, since it uses as much as digits as its factorization.

23040440421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794497945596.

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 23040440421443 its reverse (34412404404032), we get a palindrome (57452844825475).

The spelling of 23040440421443 in words is "twenty-three trillion, forty billion, four hundred forty million, four hundred twenty-one thousand, four hundred forty-three".