23707889549 has 4 divisors (see below), whose sum is σ = 23828234364. Its totient is φ = 23587544736.

The previous prime is 23707889539. The next prime is 23707889551. The reversal of 23707889549 is 94598870732.

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 22547124649 + 1160764900 = 150157^2 + 34070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23707889549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23707889491 and 23707889500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23707889539) 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, 60172112 + ... + 60172505.

It is an arithmetic number, because the mean of its divisors is an integer number (5957058591).

Almost surely, 2^23707889549 is an apocalyptic number.

It is an amenable number.

23707889549 is a deficient number, since it is larger than the sum of its proper divisors (120344815).

23707889549 is a wasteful number, since it uses less digits than its factorization.

23707889549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120344814.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 23707889549 in words is "twenty-three billion, seven hundred seven million, eight hundred eighty-nine thousand, five hundred forty-nine".