23543307909 has 64 divisors (see below), whose sum is σ = 39746949120. Its totient is φ = 13633583040.

The previous prime is 23543307899. The next prime is 23543307913. The reversal of 23543307909 is 90970334532.

23543307909 is a `hidden beast` number, since 2 + 3 + 543 + 30 + 79 + 0 + 9 = 666.

It is not a de Polignac number, because 23543307909 - 2⁹ = 23543307397 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23543307989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12178707 + ... + 12180639.

It is an arithmetic number, because the mean of its divisors is an integer number (621046080).

Almost surely, 2^23543307909 is an apocalyptic number.

It is an amenable number.

23543307909 is a deficient number, since it is larger than the sum of its proper divisors (16203641211).

23543307909 is a wasteful number, since it uses less digits than its factorization.

23543307909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759 (or 3753 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 45.

The spelling of 23543307909 in words is "twenty-three billion, five hundred forty-three million, three hundred seven thousand, nine hundred nine".