23163926809 has 3 divisors (see below), whose sum is σ = 23164079007. Its totient is φ = 23163774612.

The previous prime is 23163926791. The next prime is 23163926833. The reversal of 23163926809 is 90862936132.

The square root of 23163926809 is 152197.

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 can be written as a sum of positive squares in only one way, i.e., 16270278025 + 6893648784 = 127555^2 + 83028^2 .

It is not a de Polignac number, because 23163926809 - 2⁹ = 23163926297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23163926869) 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, 76099 + ... + 228295.

It is an arithmetic number, because the mean of its divisors is an integer number (7721359669).

Almost surely, 2^23163926809 is an apocalyptic number.

23163926809 is the 152197-th square number.

23163926809 is the 76099-th centered octagonal number.

It is an amenable number.

23163926809 is a deficient number, since it is larger than the sum of its proper divisors (152198).

23163926809 is an frugal number, since it uses more digits than its factorization.

23163926809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304394 (or 152197 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

Multiplying 23163926809 by its sum of digits (49), we get a square (1135032413641 = 1065379²).

The spelling of 23163926809 in words is "twenty-three billion, one hundred sixty-three million, nine hundred twenty-six thousand, eight hundred nine".