23440352323421 has 16 divisors (see below), whose sum is σ = 25888254594048. Its totient is φ = 21046480263600.

The previous prime is 23440352323387. The next prime is 23440352323433. The reversal of 23440352323421 is 12432325304432.

It is not a de Polignac number, because 23440352323421 - 2¹⁰ = 23440352322397 is a prime.

It is a super-2 number, since 2×23440352323421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23440352323441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29694005 + ... + 30473178.

It is an arithmetic number, because the mean of its divisors is an integer number (1618015912128).

Almost surely, 2^{23440352323421} is an apocalyptic number.

It is an amenable number.

23440352323421 is a deficient number, since it is larger than the sum of its proper divisors (2447902270627).

23440352323421 is a wasteful number, since it uses less digits than its factorization.

23440352323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60167632.

The product of its (nonzero) digits is 414720, while the sum is 38.

Adding to 23440352323421 its reverse (12432325304432), we get a palindrome (35872677627853).

The spelling of 23440352323421 in words is "twenty-three trillion, four hundred forty billion, three hundred fifty-two million, three hundred twenty-three thousand, four hundred twenty-one".