23836926989 has 2 divisors, whose sum is σ = 23836926990. Its totient is φ = 23836926988.

The previous prime is 23836926979. The next prime is 23836926991. The reversal of 23836926989 is 98962963832.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21282433225 + 2554493764 = 145885^2 + 50542^2 .

It is a cyclic number.

It is not a de Polignac number, because 23836926989 - 2⁸ = 23836926733 is a prime.

It is a super-2 number, since 2×23836926989² (a number of 22 digits) contains 22 as substring.

Together with 23836926991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23836926979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11918463494 + 11918463495.

It is an arithmetic number, because the mean of its divisors is an integer number (11918463495).

Almost surely, 2^23836926989 is an apocalyptic number.

It is an amenable number.

23836926989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23836926989 is an equidigital number, since it uses as much as digits as its factorization.

23836926989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60466176, while the sum is 65.

The spelling of 23836926989 in words is "twenty-three billion, eight hundred thirty-six million, nine hundred twenty-six thousand, nine hundred eighty-nine".