23440322143 has 32 divisors (see below), whose sum is σ = 29869931520. Its totient is φ = 17921502720.

The previous prime is 23440322141. The next prime is 23440322161. The reversal of 23440322143 is 34122304432.

It is a cyclic number.

It is not a de Polignac number, because 23440322143 - 2¹ = 23440322141 is a prime.

It is a super-2 number, since 2×23440322143² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23440322141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259048 + ... + 337618.

It is an arithmetic number, because the mean of its divisors is an integer number (933435360).

Almost surely, 2^23440322143 is an apocalyptic number.

23440322143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

23440322143 is a deficient number, since it is larger than the sum of its proper divisors (6429609377).

23440322143 is a wasteful number, since it uses less digits than its factorization.

23440322143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78727.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 23440322143 its reverse (34122304432), we get a palindrome (57562626575).

The spelling of 23440322143 in words is "twenty-three billion, four hundred forty million, three hundred twenty-two thousand, one hundred forty-three".