23638816309 has 4 divisors (see below), whose sum is σ = 23639240160. Its totient is φ = 23638392460.

The previous prime is 23638816303. The next prime is 23638816321. The reversal of 23638816309 is 90361883632.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23638816309 - 2²¹ = 23636719157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23638816303) 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 3 ways as a sum of consecutive naturals, for example, 112819 + ... + 244960.

It is an arithmetic number, because the mean of its divisors is an integer number (5909810040).

Almost surely, 2^23638816309 is an apocalyptic number.

It is an amenable number.

23638816309 is a deficient number, since it is larger than the sum of its proper divisors (423851).

23638816309 is an equidigital number, since it uses as much as digits as its factorization.

23638816309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423850.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 23638816309 in words is "twenty-three billion, six hundred thirty-eight million, eight hundred sixteen thousand, three hundred nine".