23819819 has 2 divisors, whose sum is σ = 23819820. Its totient is φ = 23819818.

The previous prime is 23819813. The next prime is 23819833. The reversal of 23819819 is 91891832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23819819 - 2²⁴ = 7042603 is a prime.

It is a super-2 number, since 2×23819819² = 1134767554385522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23819813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11909909 + 11909910.

It is an arithmetic number, because the mean of its divisors is an integer number (11909910).

Almost surely, 2^23819819 is an apocalyptic number.

23819819 is a deficient number, since it is larger than the sum of its proper divisors (1).

23819819 is an equidigital number, since it uses as much as digits as its factorization.

23819819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 23819819 is about 4880.5551938278. Note that the first 3 decimals coincide. The cubic root of 23819819 is about 287.7262501335.

The spelling of 23819819 in words is "twenty-three million, eight hundred nineteen thousand, eight hundred nineteen".