23993530681 has 4 divisors (see below), whose sum is σ = 23998375972. Its totient is φ = 23988685392.

The previous prime is 23993530679. The next prime is 23993530697. The reversal of 23993530681 is 18603539932.

It is a happy number.

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 18204755625 + 5788775056 = 134925^2 + 76084^2 .

It is a cyclic number.

It is not a de Polignac number, because 23993530681 - 2¹ = 23993530679 is a prime.

It is a super-2 number, since 2×23993530681² (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 (23993530651) 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, 2415210 + ... + 2425123.

It is an arithmetic number, because the mean of its divisors is an integer number (5999593993).

Almost surely, 2^23993530681 is an apocalyptic number.

It is an amenable number.

23993530681 is a deficient number, since it is larger than the sum of its proper divisors (4845291).

23993530681 is an equidigital number, since it uses as much as digits as its factorization.

23993530681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845290.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 23993530681 in words is "twenty-three billion, nine hundred ninety-three million, five hundred thirty thousand, six hundred eighty-one".