23935927681 has 4 divisors (see below), whose sum is σ = 24387549012. Its totient is φ = 23484306352.

The previous prime is 23935927667. The next prime is 23935927747. The reversal of 23935927681 is 18672953932.

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 17525523456 + 6410404225 = 132384^2 + 80065^2 .

It is a cyclic number.

It is not a de Polignac number, because 23935927681 - 2⁵ = 23935927649 is a prime.

It is a super-2 number, since 2×23935927681² (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 (23935927181) 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, 225810586 + ... + 225810691.

It is an arithmetic number, because the mean of its divisors is an integer number (6096887253).

Almost surely, 2^23935927681 is an apocalyptic number.

It is an amenable number.

23935927681 is a deficient number, since it is larger than the sum of its proper divisors (451621331).

23935927681 is an equidigital number, since it uses as much as digits as its factorization.

23935927681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451621330.

The product of its digits is 4898880, while the sum is 55.

The spelling of 23935927681 in words is "twenty-three billion, nine hundred thirty-five million, nine hundred twenty-seven thousand, six hundred eighty-one".