23964857281 has 4 divisors (see below), whose sum is σ = 24791231700. Its totient is φ = 23138482864.

The previous prime is 23964857261. The next prime is 23964857297. The reversal of 23964857281 is 18275846932.

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 3842016256 + 20122841025 = 61984^2 + 141855^2 .

It is a cyclic number.

It is not a de Polignac number, because 23964857281 - 2¹³ = 23964849089 is a prime.

It is a super-2 number, since 2×23964857281² (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 (23964857261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413187166 + ... + 413187223.

It is an arithmetic number, because the mean of its divisors is an integer number (6197807925).

Almost surely, 2^23964857281 is an apocalyptic number.

It is an amenable number.

23964857281 is a deficient number, since it is larger than the sum of its proper divisors (826374419).

23964857281 is an equidigital number, since it uses as much as digits as its factorization.

23964857281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826374418.

The product of its digits is 5806080, while the sum is 55.

The spelling of 23964857281 in words is "twenty-three billion, nine hundred sixty-four million, eight hundred fifty-seven thousand, two hundred eighty-one".