23104912009 has 3 divisors (see below), whose sum is σ = 23105064013. Its totient is φ = 23104760006.

The previous prime is 23104912001. The next prime is 23104912013. The reversal of 23104912009 is 90021940132.

The square root of 23104912009 is 152003.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 23104912009 - 2³ = 23104912001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23104912001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 76002 + ... + 228004.

Almost surely, 2^23104912009 is an apocalyptic number.

23104912009 is the 152003-rd square number.

23104912009 is the 76002-nd centered octagonal number.

It is an amenable number.

23104912009 is a deficient number, since it is larger than the sum of its proper divisors (152004).

23104912009 is an frugal number, since it uses more digits than its factorization.

23104912009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304006 (or 152003 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 23104912009 in words is "twenty-three billion, one hundred four million, nine hundred twelve thousand, nine".