23636389849 has 2 divisors, whose sum is σ = 23636389850. Its totient is φ = 23636389848.

The previous prime is 23636389811. The next prime is 23636389853. The reversal of 23636389849 is 94898363632.

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., 11833088400 + 11803301449 = 108780^2 + 108643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23636389849 is a prime.

It is not a weakly prime, because it can be changed into another prime (23636389949) 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 as a sum of consecutive naturals, namely, 11818194924 + 11818194925.

It is an arithmetic number, because the mean of its divisors is an integer number (11818194925).

Almost surely, 2^23636389849 is an apocalyptic number.

It is an amenable number.

23636389849 is a deficient number, since it is larger than the sum of its proper divisors (1).

23636389849 is an equidigital number, since it uses as much as digits as its factorization.

23636389849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40310784, while the sum is 61.

The spelling of 23636389849 in words is "twenty-three billion, six hundred thirty-six million, three hundred eighty-nine thousand, eight hundred forty-nine".