23443456081 has 4 divisors (see below), whose sum is σ = 23444779572. Its totient is φ = 23442132592.

The previous prime is 23443456061. The next prime is 23443456163. The reversal of 23443456081 is 18065434432.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23406246081 + 37210000 = 152991^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 23443456081 - 2²⁵ = 23409901649 is a prime.

It is a super-2 number, since 2×23443456081² (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 (23443456021) 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, 634810 + ... + 670723.

It is an arithmetic number, because the mean of its divisors is an integer number (5861194893).

Almost surely, 2^23443456081 is an apocalyptic number.

It is an amenable number.

23443456081 is a deficient number, since it is larger than the sum of its proper divisors (1323491).

23443456081 is a wasteful number, since it uses less digits than its factorization.

23443456081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323490.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 23443456081 in words is "twenty-three billion, four hundred forty-three million, four hundred fifty-six thousand, eighty-one".