23643310381 has 2 divisors, whose sum is σ = 23643310382. Its totient is φ = 23643310380.

The previous prime is 23643310357. The next prime is 23643310399. The reversal of 23643310381 is 18301334632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20015175625 + 3628134756 = 141475^2 + 60234^2 .

It is a cyclic number.

It is not a de Polignac number, because 23643310381 - 2⁹ = 23643309869 is a prime.

It is a super-2 number, since 2×23643310381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23643310321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11821655190 + 11821655191.

It is an arithmetic number, because the mean of its divisors is an integer number (11821655191).

Almost surely, 2^23643310381 is an apocalyptic number.

It is an amenable number.

23643310381 is a deficient number, since it is larger than the sum of its proper divisors (1).

23643310381 is an equidigital number, since it uses as much as digits as its factorization.

23643310381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 23643310381 in words is "twenty-three billion, six hundred forty-three million, three hundred ten thousand, three hundred eighty-one".