23638815293 has 2 divisors, whose sum is σ = 23638815294. Its totient is φ = 23638815292.

The previous prime is 23638815281. The next prime is 23638815349. The reversal of 23638815293 is 39251883632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22403503684 + 1235311609 = 149678^2 + 35147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23638815293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23638815203) 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, 11819407646 + 11819407647.

It is an arithmetic number, because the mean of its divisors is an integer number (11819407647).

Almost surely, 2^23638815293 is an apocalyptic number.

It is an amenable number.

23638815293 is a deficient number, since it is larger than the sum of its proper divisors (1).

23638815293 is an equidigital number, since it uses as much as digits as its factorization.

23638815293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 50.

The spelling of 23638815293 in words is "twenty-three billion, six hundred thirty-eight million, eight hundred fifteen thousand, two hundred ninety-three".