23971925869 has 4 divisors (see below), whose sum is σ = 23972561820. Its totient is φ = 23971289920.

The previous prime is 23971925863. The next prime is 23971925899. The reversal of 23971925869 is 96852917932.

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 13639203369 + 10332722500 = 116787^2 + 101650^2 .

It is a cyclic number.

It is not a de Polignac number, because 23971925869 - 2⁵ = 23971925837 is a prime.

It is a super-2 number, since 2×23971925869² (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 (23971925863) 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, 257614 + ... + 338095.

It is an arithmetic number, because the mean of its divisors is an integer number (5993140455).

Almost surely, 2^23971925869 is an apocalyptic number.

It is an amenable number.

23971925869 is a deficient number, since it is larger than the sum of its proper divisors (635951).

23971925869 is an equidigital number, since it uses as much as digits as its factorization.

23971925869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635950.

The product of its digits is 14696640, while the sum is 61.

The spelling of 23971925869 in words is "twenty-three billion, nine hundred seventy-one million, nine hundred twenty-five thousand, eight hundred sixty-nine".